Test No.

Work in Physics MCQs

Multiple Choice Questions:

1. Work is defined as:

o A. Force multiplied by displacement
o B. Mass multiplied by acceleration
o C. Distance divided by time
o D. Force divided by time
2. The SI unit of work is:
o A. Newton
o B. Joule
o C. Watt
o D. Meter
3. If a force acts perpendicular to the direction of motion, the work done is:
o A. Positive
o B. Negative
o C. Zero
o D. Depends on the magnitude of the force
4. A person lifts a heavy box. The work done by the person is:
o A. Positive
o B. Negative
o C. Zero
o D. Depends on the weight of the box
5. A machine does 1000 J of work in 5 seconds. Its power is:
o A. 200 W
o B. 5000 W
o C. 0.005 W
o D. 0.2 W
6. The work-energy theorem states that:
o A. Work done on an object is equal to its change in kinetic energy
o B. Work done on an object is equal to its change in potential energy
o C. Work done on an object is equal to its mass times acceleration
o D. Work done on an object is equal to its distance traveled
7. A ball is thrown upward. As it rises, its potential energy:
o A. Increases
o B. Decreases
o C. Remains constant
o D. Depends on the mass of the ball
8. A car accelerates from rest. Its kinetic energy:
o A. Increases
o B. Decreases
o C. Remains constant
o D. Depends on the mass of the car
9. A machine is 100% efficient. This means that:
o A. It converts all input energy into useful output energy
o B. It loses some energy as heat
 o C. It gains energy from the environment
o D. It is impossible to build
10. A simple machine can:

 A. Increase the magnitude of a force

 B. Change the direction of a force
 C. Increase the distance a force acts over
 D. All of the above

11. Energy is:

o A. The ability to do work
o B. A force applied over a distance
o C. The rate at which work is done
o D. Mass multiplied by acceleration
12. The SI unit of energy is:
o A. Newton
o B. Joule
o C. Watt
o D. Meter
13. Kinetic energy is:
o A. Energy of motion
o B. Energy stored in an object due to its position
o C. Energy associated with heat
o D. Energy associated with sound
14. Potential energy is:
o A. Energy of motion
o B. Energy stored in an object due to its position
o C. Energy associated with heat
o D. Energy associated with sound
15. The law of conservation of energy states that:
o A. Energy cannot be created or destroyed, only transferred or transformed
o B. Energy is always lost due to friction
o C. Energy is always gained due to work
o D. Energy is always constant in a closed system
16. A ball is thrown upward. As it rises, its kinetic energy:
o A. Increases
o B. Decreases
o C. Remains constant
o D. Depends on the mass of the ball
17. A spring is stretched. It has:
o A. Kinetic energy
o B. Potential energy
o C. Thermal energy
o D. No energy
18. A car accelerates from rest. Its kinetic energy:
o A. Increases
o B. Decreases
o C. Remains constant
o D. Depends on the mass of the car
19. A pendulum swings back and forth. At its highest point, its energy is mostly:
 o A. Kinetic
o B. Potential
o C. Thermal
o D. Sound
20. A light bulb converts electrical energy into:

 A. Mechanical energy
 B. Thermal energy

21. C. Chemical energyA car travels 100 km in 2 hours. What is its average speed?
o A. 50 km/h
o B. 200 km/h
o C. 25 km/h
o D. 100 km/h
22. A ball is thrown straight upward with an initial velocity of 20 m/s. How long does
it take to reach its maximum height?
o A. 2 seconds
o B. 4 seconds
o C. 5 seconds
o D. 10 seconds
23. A train accelerates uniformly from rest to a speed of 30 m/s in 10 seconds. What
is its acceleration?
o A. 1 m/s²
o B. 2 m/s²
o C. 3 m/s²
o D. 4 m/s²
24. A car is moving at a constant speed of 30 m/s. If it travels for 5 seconds, how far
does it go?
o A. 150 meters
o B. 6 meters
o C. 300 meters
o D. 35 meters
25. A ball is dropped from a height of 100 meters. How long does it take to hit the
ground?
o A. 10 seconds
o B. 5 seconds
o C. 20 seconds
o D. 2 seconds
26. A car is traveling at 20 m/s. It decelerates uniformly to a stop in 5 seconds. What
is its deceleration?
o A. -4 m/s²
o B. 4 m/s²
o C. -2 m/s²
o D. 2 m/s²
27. A ball is thrown horizontally from a cliff with an initial velocity of 10 m/s. If it
takes 2 seconds to hit the ground, how far does it travel horizontally?
o A. 20 meters
o B. 10 meters
o C. 40 meters
o D. 5 meters
28. A car is moving at a constant speed of 20 m/s. If it rounds a curve without
changing its speed, is it accelerating?
o A. Yes
o B. No
o C. Depends on the radius of the curve
o D. Depends on the mass of the car
29. A ball is thrown upward. At its highest point, its acceleration is:
o A. Zero
o B. 9.8 m/s² downward
o C. 9.8 m/s² upward
o D. Depends on the initial velocity
30. A car is traveling at 30 m/s. If it doubles its speed, its kinetic energy increases by
a factor of:

 A. 2
 B. 4
 C. 8
 D. 16

31. Electric current is defined as:

o A. The flow of electrons
o B. The flow of protons
o C. The flow of neutrons
o D. The flow of atoms
32. The SI unit of electric current is:
o A. Ampere (A)
o B. Volt (V)
o C. Ohm (Ω)
o D. Coulomb (C)
33. A conductor is a material that:
o A. Allows the flow of electric current
o B. Resists the flow of electric current
o C. Does not allow the flow of electric current
o D. Is a good insulator
34. An insulator is a material that:
o A. Allows the flow of electric current
o B. Resists the flow of electric current
o C. Does not allow the flow of electric current
o D. Is a good conductor
35. Ohm's law states that:
o A. Current is directly proportional to voltage and inversely proportional to
resistance
o B. Voltage is directly proportional to current and inversely proportional to
resistance
o C. Resistance is directly proportional to voltage and inversely proportional to
current
o D. All of the above
36. The formula for Ohm's law is:
o A. V = I * R
o B. I = V * R
 o C. R = V * I
o D. V = R / I
37. A resistor is a device that:
o A. Increases the flow of electric current
o B. Decreases the flow of electric current
o C. Stores electrical energy
o D. Generates electrical energy
38. The resistance of a conductor depends on:
o A. Length
o B. Cross-sectional area
o C. Temperature
o D. All of the above
39. A series circuit is a circuit in which:
o A. All components are connected in a line
o B. All components are connected in parallel
o C. The current is the same through all components
o D. The voltage is the same across all components
40. A parallel circuit is a circuit in which:

A. All components are connected in a line

B. All components are connected in parallel

C. The current is the same through all components

D. The voltage is the same across all components

41. When an alternating current (AC) is applied to a resistor, the current and
voltage are:

A. In phase

B. 90 degrees out of phase

C. 180 degrees out of phase

D. None of the above

41. When an AC is applied to a capacitor, the current leads the voltage by:

A. 0 degrees

B. 45 degrees

C. 90 degrees

D. 180 degrees

42. When an AC is applied to an inductor, the voltage leads the current by:
 A. 0 degrees

B. 45 degrees

C. 90 degrees

D. 180 degrees

43. The impedance of a resistor is:

A. Purely resistive

B. Purely inductive

C. Purely capacitive

D. None of the above

44. The impedance of a capacitor is:

A. Purely resistive

B. Purely inductive

C. Purely capacitive

D. None of the above

45. The impedance of an inductor is:

A. Purely resistive

B. Purely inductive

C. Purely capacitive

D. None of the above

46. In an R-L-C series circuit, the impedance is:

A. The sum of the individual impedances

B. The square root of the sum of the squares of the individual impedances

C. The product of the individual impedances

D. None of the above

47. The phase angle in an R-L-C series circuit is:

 A. The angle between the current and the voltage

B. The angle between the voltage and the impedance

C. The angle between the current and the impedance

D. None of the above

48. The resonant frequency of an R-L-C series circuit is:

A. The frequency at which the impedance is minimum

B. The frequency at which the impedance is maximum

C. The frequency at which the current is maximum

D. The frequency at which the voltage is maximum

49. An ammeter is used to measure:

o A. Voltage
o B. Current
o C. Resistance
o D. Power
50. An ammeter should be connected in:
o A. Series
o B. Parallel
o C. Both series and parallel
o D. Neither series nor parallel
51. An ideal ammeter has:
o A. Infinite resistance
o B. Zero resistance
o C. High resistance
o D. Low resistance
52. A real ammeter has:
o A. Infinite resistance
o B. Zero resistance
o C. High resistance
o D. Low resistance
53. To measure the current flowing through a resistor, the ammeter should be
connected:
o A. In series with the resistor
o B. In parallel with the resistor
o C. Before the resistor
o D. After the resistor
54. The reading on an ammeter is:
o A. Proportional to the voltage across it
o B. Proportional to the current flowing through it
o C. Proportional to the resistance of the circuit
o D. Proportional to the power dissipated by the circuit
 55. If an ammeter is connected in parallel with a resistor, the reading on the
ammeter will be:
o A. Very high
o B. Very low
o C. Zero
o D. The same as the current flowing through the resistor
56. An ammeter should be calibrated:
o A. Before each use
o B. Once a year
o C. Never
o D. Only when it gives incorrect readings
57. The accuracy of an ammeter depends on:
o A. Its resistance
o B. The range it is set to
o C. The current being measured
o D. All of the above
58. An ammeter can be used to measure:

A. Direct current (DC) only

B. Alternating current (AC) only

C. Both DC and AC

D. Neither DC nor AC

“Always be brave, because we learn from what

we go through."

With Best Wishes