Rate of doing work is called?
A. Energy
B. Velocity
C. Power
D. Force
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A photoelectric cell converts
A. mechanical energy to electrical energy
B. heat energy to mechanical energy
C. light energy to chemical energy
D. light energy to electrical energy
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Force/acceleration?
A. Momentum
B. Speed
C. Mass
D. Pressure
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The work done by an object is 56 J and applied force on object is 7 N. Find the displacement.
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Which of the following is the effect of balanced force applied on an object?
A. Change in shape of an object
B. Change in steady state of an object
C. Change in the direction of speed of an object
D. Change in the speed of an object
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The mass of an object is 85 kg and the velocity is 60 ms-1 . Find the momentum of the object.
A. 5,700 kg ms-1
B. 5,100 kg ms-1
C. 51,000 kg ms-1
D. 510 kg ms-1
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A person does 1000J of work in 2s. What was the energy he spent?
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In the correct of Ocean Energy Conversion, 'T' in OTEC stands for
A. Thermal
B. Thermodynamic
C. Technological
D. Tidal
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If an object not moving after applying a force, then we can say that-
A. Maximum power has used
B. Work has done
C. Minimum power has used
D. Any work has not done
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What will be the mass of the girl weighing 450 N?
A. 450 kg
B. 45 kg
C. 459 kg
D. 45.9 kg
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An object of mass 10 kg is moving with a velocity of 2 ms-1 . The momentum contained in the object is-
A. 5 kgms1
B. 20 kgms-1
C. 5 kgms-1
D. 20 kgms1
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If the velocity of an object moving at a certain height is increase 4 times, then what will be the change in the potential energy of the object?
A. Potential energy will be constant
B. Potential energy will be half of its original value
C. Potential energy will be doubled
D. Potential energy will be 4 times of its original value
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Which of the following statement regarding energy is not true?
A. Energy is not a physical substance
B. Energy is the measure of the ability to perform a task
C. Energy can be stored and measured in many ways
D. The energy released during conversion goes into vacuum
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If the speed of the cycle is doubled then the kinetic energy will be?
A. 16 time
B. 8 time
C. 4 time
D. 2 time
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Power = T W , what is the meaning of W?
A. Power
B. Weight
C. Watt
D. Work done
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If the velocity of an object becomes twice that of its initial velocity, then its kinetic energy become n times of its initial kinetic energy. Then what would be the value of n?
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Which energy of the wind does a windmill use?
A. Thermal energy
B. Kinetic energy
C. Heat energy
D. Hydro energy
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Inertia of an object is measured in which of the following?
A. Velocity
B. Colour
C. Weight
D. Mass
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Which of the following is not an example of work done?
A. A man pushing against the wall
B. Trolley moves when the boy pushes the trolley
C. Applied force on an object in that direction the object is moving
D. Raise the book to some height and walking
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A cube of mass 0.5 kg is moving at a speed of 2.0 m/s on a smooth surface. It collides with another object of 1.0 kg and both move together as a single object. What will be the energy loss during the collision?
A. 0.16J
B. 1J
C. 0.67J
D. 0.32J
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