Practice Work, Power and Energy RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Physics question set covers important concepts related to work, power, energy, kinetic energy, potential energy, mechanical energy and the conservation of energy.
The Work, Power and Energy RRB PYQ collection is useful for candidates preparing for Railway examinations and revising important Physics concepts through previous year questions. Questions from this topic can include both conceptual and numerical problems, making regular practice important for improving calculation accuracy and understanding the application of Physics formulas.
Whether you are preparing for RRB NTPC Work, Power and Energy PYQ, RRB Group D Work, Power and Energy PYQ, RRB JE Work, Power and Energy PYQ, RRB ALP Work, Power and Energy PYQ, or RRB Technician Work, Power and Energy PYQ, practice these previous year questions regularly as part of your Railway Physics preparation.
Start practicing Work, Power and Energy RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
271
A 0.5 kg mobile phone is dropped from a balcony 100 m high. Find its initial potential energy. (g = 10 m/s²)
RRB Group D
24/09/2018 / Shift-II
2018
✓ Answer:D500 J
U = mgh = 0.5 × 10 × 100 = 500 J.
272
Find the kinetic energy of a 20 kg object moving at 6 m/s.
RRB Group D
05/12/2018 / Shift-III
2018
✓ Answer:B360 J
K = (1/2) × 20 × 6² = 360 J.
273
An 11 kg object is placed 8 m above the ground. Find its energy.
RRB Group D
16/10/2018 / Shift-I
2018
✓ Answer:D862.4 J
Using g = 9.8 m/s², U = 11 × 9.8 × 8 = 862.4 J.
274
The figure shows two moving vehicles. What can be concluded about their energy?
RRB Group D
05/11/2018 / Shift-I
2018
✓ Answer:DBoth have kinetic energy.
Both vehicles are in motion and have kinetic energy. The source illustration is represented by the text description in the question.
275
A 15 kg object is 5 m above the ground. Find its energy.
RRB Group D
15/10/2018 / Shift-I
2018
✓ Answer:D735 J
Using g = 9.8 m/s², U = 15 × 9.8 × 5 = 735 J.
276
Water raised to a height has _____ energy.
RRB Group D
15/11/2018 / Shift-II
2018
✓ Answer:BPotential
Elevated water stores gravitational potential energy.
277
A 10 kg object is 6 m above the ground. Find its potential energy. (g = 9.8 m/s²)
RRB Group D
31/10/2018 / Shift-II
2018
✓ Answer:B588 J
U = 10 × 9.8 × 6 = 588 J.
278
A boy releases a gas-filled balloon that rises. How does its gravitational potential energy change?
RRB Group D
07/12/2018 / Shift-I
2018
✓ Answer:DIncreases
For fixed mass and g, U = mgh increases as the balloon rises.
279
An object is thrown vertically upward and reaches maximum height h. At height h/4, it has:
RRB Group D
28/11/2018 / Shift-I
2018
✓ Answer:ALess potential energy and more kinetic energy
Total energy is mgh. At h/4, U = mgh/4 and K = 3mgh/4, so K exceeds U.
280
If a bicycle's speed doubles, its kinetic energy becomes:
RRB Group D
22/09/2018 / Shift-III
2018
✓ Answer:C4 times
K ∝ v², so doubling speed gives four times the kinetic energy.
Showing 271 – 280 of 298 MCQ Questions | Page 28 of 30
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