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PHY101 Solved Grand Quiz Spring 2021
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PHY101 SOLVED MCQs
| Sr No. | MCQS QUESTION | ANSWER |
| 1 | A body will be in translation equilibrium if: | F = 0 |
| 2 | The fundamental dimensions of angular momentum are . | ML2T-1 |
| 3 | Water flows into a house at a velocity of 15 m/s through a pipe that has a radius of 0.40 m. The water then flows through a smaller pipe at a velocity of 45 m/s. what is the radius of the smaller pipes? | 0.23 m |
| 4 | The ultimate strength of a sample is the stress at which the sample | Breaks |
| 5 | A stone is thrown up from the surface of earth, the it reaches a maximum height, kinetic energy is equal to: | Zero |
| 6 | If the speed of sound is 340m/s a plane flying at 400m/s creates a conical shock wave with an apex half angle of: | 58? |
| 7 | The law of inertia was firstly formulated by: | Newton |
| 8 | Bodies which falls freely under gravity provides good example of motion under: | Uniform acceleration |
| 9 | The value of k in coulomb’s law depends upon | Medium between two charges |
| 10 | Which of the following statement about floating objects correct? | The buoyant force equals the object’s weight. |
| 11 | Let F1 be the magnitude of the gravitational force exerted on the sun by Earth and F2 be the magnitude of the force exerted on Earth by the sun. Then: | F1 is equal to F2 |
| 12 | Sound waves are | Longitudinal |
| 13 | The first condition of equilibrium implies that: | F = 0 |
| 14 | One revolution is the same as: | 2n rad |
| 15 | Ali wants to lift a mass of 7.5 kg with constant velocity by a rope that passes through a frictionless pulley which is attached to the ceiling of room. Calculate the tension in the rope by neglecting the mass of the rope. | 75 N |
| 16 | The speed of a sound wave is determined by: | The transmitting medium |
| 17 | A force of 100 N acts upon a body for five second. What will be the change in momentum? | 500 NS |
| 18 | Which pair will always have the same magnitude to the rate of change of position? | Instantaneous speed and instantaneous velocity |
| 19 | A municipal water supply is provided by a tall water tower. Water from this flower to a building. How does the water flow out of a faucet on the ground floor of a building compare with the water flow out of an identical faucet on the second floor of the building? | Water flows more rapidly out of the ground-floor faucet. |
| 20 | The dot product of vector A with itself is equal to | A^2 |
| 21 | An elastic collision is one in which: | Kinetic energy and momentum are both conserved |
| 22 | The center of mass of Earth’s atmosphere is : | Near the center of Earth |
| 23 | For a body to be in equilibrium under the combined action of several forces. | The sum of the torques about any point must equal zero |
| 24 | Swimming becomes possible because of: | Third law of motion |
| 25 | When a wave travels through a medium | Energy is transferred at a constant speed |
| 26 | Young’s modulus is a proportionality constant that relates the force per unit area applied perpendicularly at the surface of an object to: | The fractional change in length |
| 27 | Coulomb’s law is only true for point charges whose sizes are | Very small |
| 28 | Which of the following statement is true? | Weight is a force, mass is a measure of inertia |
| 29 | Possible unit of angular momentum are: | Kg.m/s2 |
| 30 | If the force acting on a body is doubled then the acceleration becomes: | Double |
| 31 | Momentum may be expressed in: | N.s |
| 32 | A man, with his arms at his sides, is spinning on a light frictionless turntable. When he extends his arms: | His angular momentum remains the same |
| 33 | The approximate value of g at an altitude above Earth equal to one Earth diameter is: | 1.1m/s2 |
| 34 | Young’s modulus can be used to calculate the strain for a stress that is: | Well below the yield strength |
| 35 | Unit of distance is: | Light year |
| 36 | SI unit of time period is________. | Second |
| 37 | The rate of change of momentum of a body is equal to: | Applied force |
| 38 | A rocket ship is coasting toward a planet. Its captain wishes to know the value of g at the surface of the planet. This may be inferred by: | Observing the ship’s acceleration and correcting for the distance from the center of the planet: |
| 39 | A 1-kg block is lifted vertically 1m by a boy. The work done by the boy is about: | 10 J |
| 40 | As the wavelength of a wave in a uniform medium increases, its frequency will______. | Decrease |
| 41 | Which of the following cases is/are NOT a uniformly accelerated motion? A feather falls from a certain height inside a vacuum tube.A ball rolls along a frictionless plane at uniform speed.A coin falls from a certain height in air but air resistance is negligible. | (ii) only |
| 42 | As per coulomb’s law, the force of attraction or repulsion between two point charge directly proportional to the. | Product of the magnitude of charges |
| 43 | Which of the following statement about completely submerged objects resting on the ocean bottom is correct? | The apparent weight of the object depends on the object ‘s density |
| 44 | The momentum of an object at a given instant is independent of its: | Acceleration |
| 45 | A vector A is added to a vector B. the resultant vector A + B have greatest magnitude when: | When vectors A and B are parallel and in the same direction |
| 46 | Two sound waves are traveling through a container of unknown gas. Wave A has a wavelength of 1.2 m. wave B has a wavelength of 3.6M. The velocity of wave B must be_____ the velocity of wave A. | The same as |
| 47 | Work has dimensions like: | Torque |
| 48 | Which statement is not true for acceleration? | Riding your bike straight down the street at a constant speed |
| 49 | Water flows into a house at a velocity of 15 m/s through a pipe that has a radius of 0.40 m. the water then flows through a smaller pipe at a velocity of 45 m/s. what is the radius of the smaller pipe? | 0.23 m |
| 50 | The unit kg.m2/s can be used for: | Angular momentum |
| 51 | A water tunnel has a circular cross section where the diameter diminishes from 3.6 m to 1.2 m. if the velocity of water flow is 3.0 m/s in the large part of the tunnel, what is the velocity of flow in the smaller part of the tunnel? | 27 m/s |
| 52 | What is the angle of projection of projectile, for which its maximum height and horizontal range are equal? | 76 |
| 53 | A mosquito’s buzz is often rated with a decibel rating of 40 dB. Normal conversation is often rated at 60 dB. How many times more intense is normal conversation compared to a mosquito’s buzz? | 100 |
| 54 | People try to keep the………… over their feet, in order to feel stable. | Centre of gravity |
| 55 | The goal of all scientific inquiry (or scientific method) is: | Predicting natural events based on known patterns |
| 56 | Before the density of an object can be found, what two measurements are required? | Mass and volume |
| 57 | A……………….. vector is obtained by dividing the vector by its magnitude: | unit |
| 59 | When two lights are in close proximity to each other, flashing alternately, appear to be one light moving back and forth, it is called: | Phi phenomenon |
| 60 | Which of the following monocular cue refers that higher objects seem to be more distant? | Relative height |
| 61 | Which of the following is NOT one of Piaget’s stages of development? | Operational |
| 62 | 50 school going children were given the certain medione for increasing their energy level. What is the dependent variable in this research? | Amount of medicine |
| 63 | The amount of light entering the eye is controlled by which of the followings? | Pupil |
| 64 | Which of the following process is suggested by Bandura that help human behavior to learn? | Observation |
| 65 | A gene that only influences the expression of a trait when paired with an identical gene is known as what? | Dominant |
| 66 | Who formulated the Law of Effect? | Thorndike |
| 67 | All of the following are the areas of interest for Behaviorists EXCEPT: | Unconscious desires |
| 68 | Which of the following principle was NOT proposed by Aristotle? | Ground and Figure |
| 69 | Which of the following need as proposed by Maslow is fulfilled through marriage and friendship? | Safety |
| 70 | Which of the following learning forms an association between two stimuli? | Classical conditioning |
| 71 | Which of the following statement best describes “Hormones”? | Chemicals released into the bloodstream by the endocrine glands |
| 72 | Which of the following structure of ear is a tube like passage through which the sound waves travel to the inner part of the ear? | Ear drum |
| 73 | Helmholtz’s explanation of color vision is called as what? | Trichromatic theory |
| 74 | Rod-shaped structures in the cell nucleus that contain genes are referred as what? | Chromosomes |
| 75 | The wave pattern which becomes more regular and may momentarily shows sharp peaks, or waves that are sharply pointed, is/are called: | Sleep spindles |
| 76 | In which of the following process sensory receptors become less sensitive to repeated presentations of the same stimulus? | Sensation |
| 78 | In the theory of classical conditioning, the acronym UCR stands for which of the following? | Unconditioned response |
| 79 | Jean Piaget is famous for his theory of ________. | Cognitive development |
| 80 | Farha is interested to study about progressive change in individuals’ body and their functions throughout the life span. She is more likely to study: | Biological changes |
| 81 | All of the following are considered as the founders of gestalt school of thought EXCEPT: | Max Wertheimer |
| 82 | Which of the following statement best describes the survey research method? | sample of people are asked questions |
| 83 | Which of the following statement best describes “Endocrine glands”? | These are chemicals released into the bloodstream |
| 84 | All of the following statements concern with the concept of learning EXCEPT: | Learning is another word for physical growth |
| 85 | Which of the following is NOT a part of mid brain? | Cerebrum |
| 86 | Which of the following therapy was introduced by Albert Ellis? | Rational-Emotive Behavior Therapy |
| 87 | People do take drugs for all of the following reasons Except: | Building relationships |
| 88 | Which of the following process is suggested by Bandura that help human behavior to learn? | Observation |
| 89 | In “Little Albert” study, which of the following was the fear-producing stimulus used as UCS? | Loud noise |
| 90 | Who gave the concept of “Tabula Rasa”? | John Locke |
| 91 | Which of the following harmone is involved in the growth and proper functioning of gonads and ovaries? | Gonadotropic |
| 92 | Who among the followings gave the concept of Insight? | Wolfgang Kohler |
| 93 | Which of the following psychologist refers that environment and external world shapes and determines behavior? | J. B. Watson |
| 94 | Which of the followings are the branch-like structures that receive messages from other neurons? | Dendrites |
| 95 | Today psychology is considered as the scientific study of which of the followings? | Behavior and mental processes |
| 96 | Which of the following syndrome occurs when excessive amounts of glucocorticoid hormones are secreted in the body? | Cushing syndrome |
| 97 | Who among the following talked about the “cognitive maps”? | Tolman |
| 98 | All of the following are the nature of correlation EXCEPT: | Standard Correlation |
| 99 | Which of the following is a clear and colorless fluid covering the entire surface of central nervous system? | Cerebrospinal fluid |
| 100 | Coherent sources of light mean ________. | They must have same frequency |
| 101 | Point where force causes system to move without rotation is | center of mass |
| 102 | When you step on the accelerator to increase the speed of your car, the force that accelerates the car is | the force of friction of the road on the tires |
| 103 | The focal length of a spherical mirror is N times its radius of curvature where N is: | 1/2 |
| 104 | When an object (iron/tungsten) is heated, it emits light, it emits infrared (IR) light when it is heated at a temperature ________. | Below 800 degree C |
| 105 | Earth exerts a gravitational force on the Moon, keeping it in its orbit. The reaction to this force, in the sense of Newton’s third law, is: | the centripetal force on the Moon |
| 106 | The torque about any two points has the same value when the body is in. | translational equilibrium |
| 107 | The turning effect of a force is called the force’s. | torque/moment |
| 108 | The fundamental dimensions of angular momentum are | ML2T-1 |
| 109 | Sound waves are | longitudinal |
| 110 | A light entering into glass prism from air does not give change in its: | Frequency |
| 111 | Add two vectors of length 4 m & 5 m but their orientation is not known, The length after addition of these two vectors will be: | between 9 m and 1 m |
| 112 | Which of the following is true of all virtual images? | None of the given |
| 113 | The wavelength of red light is 700 nm. Its frequency is ________. | 4.29 * 10^14 Hertz |
| 114 | Kirchhoff’s first rule is the manifestation of the law of conservation of: | Charge |
| 115 | Which of the following will remain unchanged when a sound wave travels in air or in water? | Frequency |
| 116 | Bending of light around the edges of an obstacle called: | Diffraction |
| 117 | Which of the following statements are TRUE of sound waves? Identify all that apply. | To hear the sound of a tuning fork, the tines of the fork must move air from the fork to one’s ear |
| 118 | Electric energy is measured: | Kilowatt hour |
| 119 | When the momentum of a body is doubled, its kinetic energy ________ . | Becomes four times its initial energy |
| 120 | A plane produces a sonic boom only when: | it flys faster than the speed of sound |
| 121 | If Io is the peak value of an AC supply, then its rms value is given as lrms: | Io/{2 |
| 122 | A force of 5000N is applied outwardly to each end of a 5.0-m long rod with a radius of 34.0 cm and a Young’s modulus of 125 x 108 N/m2. The elongation of the rod is: | 0.0020mm |
| 123 | The sum of electric and magnetic force is called: | Lorentz force |
| 124 | The total energy in an LC circuit is 5.0 × 10-6 J. If L = 25mH the maximum current is: | 20mA |
| 125 | Which of the following electromagnetic radiations has photons with the greatest energy? | x rays |
| 126 | According to the equation of work, when a boy sits in one place and studies for the whole night , he does | no work |
| 127 | A source of frequency of 500 Hz emits waves of wavelength 0.4 m, how long does the wave take to travel 600 m? | 3 s |
| 128 | acceleration of an object must be zero at a point where: | the average velocity is zero |
| 129 | No lens is perfect because ________. | They suffer from aberration |
| 130 | If 0.5 T field over an area of 2m3 which lies at an angle of 600 with field.. Then the resultant flux will be | 0.50 Wb |
| 131 | The center of mass of a uniform disk of radius R is located: | at the center |
| 132 | Following are the ways by which light can interact with matter, EXCEPT: | Interference |
| 133 | A 2.0-kg block travels around a 0.5-m radius circle with an angular velocity of 12 rad/s. Its angular momentum about the center of the circle is: | 12 kg.m2/s |
| 134 | If a simple pendulum oscillates with an amplitude 50 mm and time period 2s, then its maximum velocity is. | 0.15 m/s |
| 135 | The angular momentum vector of Earth about its rotation axis, due to its daily rotation, is directed: | north |
| 136 | Coulomb’s law is only true for point charges whose sizes are | Large |
| 137 | A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is: | 1000V |
| 138 | Work may be done by ________. | only living organisms |
| 139 | A mosquito’s buzz is often rated with a decibel rating of 40 dB. Normal conversation is often rated at 60 dB. How many times more intense is normal conversation compared to a mosquito’s buzz? | 20 |
| 140 | The least distance of distinct vision for normal eye: | 25 cm |
| 141 | The amplitude modulation frequency ranges from: | 540 kHz to 1600 kHz |
| 142 | A sound wave has a wavelength of 3.0m. The distance from a compression center to the adjacent to the rarefaction center is: | need to know frequency |
| 143 | A force of 120 N is exerted on a 40 kg container which sits on afloor. If the frictional force between floor and container is 80 N. What is the magnitude of the acceleration of the container? | 2 ms^-2 |