Work, Energy, and Power MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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A motor has a power rating of 500 W and runs for 2 hours. How much energy does it consume?
A. 1 kWh
B. 0.5 kWh
C. 2 kWh
D. 4 kWh
Answer: 1 kWh
Which of the following statements is true about energy?
A. Energy can be created and destroyed
B. Energy can only be transformed from one form to another
C. Energy is always conserved in an isolated system
D. Energy cannot be transferred from one object to another
Answer: Energy can only be transformed from one form to another
The power of a device is calculated by:
A. Power = Work / Time
B. Power = Force x Distance
C. Power = Energy / Force
D. Power = Mass x Acceleration
Answer: Power = Work / Time
Mechanical energy is the sum of:
A. Potential and kinetic energy
B. Thermal and electrical energy
C. Kinetic and electrical energy
D. Potential and chemical energy
Answer: Potential and kinetic energy
The unit of energy in the International System (SI) is:
A. Newton
B. Watt
C. Joule
D. Kilogram
Answer: Joule
The work-energy theorem states that:
A. Work done on an object equals the change in its energy
B. Energy is always conserved
C. Work is a force applied over a distance
D. Energy can never be created nor destroyed
Answer: Work done on an object equals the change in its energy
Which of the following has the greatest kinetic energy?
A. A fast-moving car
B. A stationary car
C. A parked bicycle
D. A moving ball
Answer: A fast-moving car
The gravitational potential energy of an object depends on:
A. Mass, height, and gravitational acceleration
B. Mass, height, and velocity
C. Speed, height, and mass
D. Temperature, mass, and height
Answer: Mass, height, and gravitational acceleration
The formula for work is:
A. Work = Force / Distance
B. Work = Force x Distance
C. Work = Mass x Velocity
D. Work = Mass x Acceleration
Answer: Work = Force x Distance