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.
211
A 15 kg object has kinetic energy of 120 J. Find its velocity.
RRB Group D
09/10/2018 / Shift-II
2018
✓ Answer:B4 m/s
v = √(2K/m) = √(240/15) = 4 m/s.
212
A uniform 2 m chain of mass 4 kg lies on a table with 60 cm hanging over its edge. Find the work needed to pull the whole chain onto the table.
RRB Group D
07/12/2018 / Shift-I
2018
✓ Answer:C3.6 J
Hanging mass = (4/2) × 0.6 = 1.2 kg. Its centre rises 0.3 m. W = 1.2 × 10 × 0.3 = 3.6 J.
213
What energy does a raised hammer have?
RRB ALP & Technician
09/08/2018 / Shift-III
2018
✓ Answer:DPotential energy
A raised hammer has gravitational potential energy because of its height.
214
Find the kinetic energy of a 15 kg object moving at 8 m/s.
RRB Group D
09/10/2018 / Shift-II
2018
✓ Answer:A480 J
K = (1/2) × 15 × 8² = 480 J.
215
Particles in which state have the greatest kinetic energy in the comparison used here?
RRB Group D; RRB Group D
26/10/2018 / Shift-III; 12/11/2018 / Shift-III
2018
✓ Answer:DGas
The PDF keys gases in its elementary comparison of states. Actual mean particle kinetic energy depends on temperature.
216
If an object's velocity doubles, its kinetic energy becomes n times the original. Find n.
RRB ALP & Technician
13/08/2018 / Shift-II
2018
✓ Answer:B4
K ∝ v², so n = 2² = 4.
217
An 11 kg object is 6 m above the ground. Find its energy. (g = 9.8 m/s²)
RRB Group D
15/10/2018 / Shift-III
2018
✓ Answer:B646.8 J
U = 11 × 9.8 × 6 = 646.8 J.
218
An object's gravitational potential energy increases with its:
RRB Group D
10/10/2018 / Shift-I
2018
✓ Answer:BHeight
U = mgh, so increasing height increases gravitational potential energy.
219
Which can neither be created nor destroyed?
RRB ALP & Technician
14/08/2018 / Shift-III
2018
✓ Answer:AEnergy
Conservation of energy states that energy can change form but cannot be created or destroyed.
220
A bullet fired from a gun penetrates its target because it possesses:
RRB Group D
10/10/2018 / Shift-III
2018
✓ Answer:DKinetic energy
The fast-moving bullet has kinetic energy that can do work on the target.
Showing 211 – 220 of 298 MCQ Questions | Page 22 of 30
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