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Engineering Physics Multiple Choice Questions | MCQs | Quiz

Engineering Physics Interview Questions and Answers
Practice Engineering Physics questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Laws Governing Gravity
•   Gravity Acceleration
•   Scalar & Vector
•   Plane Motion - 1
•   Plane Motion - 2
•   Forces
•   Gravity
•   Gravity Effect
•   Friction & Forces - 1
•   Friction & Forces - 2
•   Friction & Forces - 3
•   Nature Laws
•   Acceleration
•   Friction & Motion
•   Energy Conservation
•   Inertia Moment
•   Work, Energy & Power
•   Collision & Friction
•   Work & Energy
•   Restitution Coefficient
•   Forces & Inertia
•   Nature Forces
•   Gravitational & Gravity
•   Work Done
•   Centripetal Force
•   Energy
•   Inertia Moment
•   Inertia Significance
•   Rotational Motion
•   Angular Momentum
•   Torque & Momentum
•   Translational Motion
•   Solids Classification
•   Body Weight
•   Earth Mass & Density
•   Gravitational Field
•   Gravitational Potential Field
•   Liquid Thurst
•   Buoyancy
•   Thermal Conduction
•   Temperature & Heat
•   Elasticity
•   Elastic Limit
•   Stress & Strain
•   Streamline & Turbulent Flow
•   Thermal Conductivity
•   Thermal Expansion
•   Orbital Velocity
•   Latent Heat
•   Absorption & Emission
•   Thermodynamics - 1
•   Thermodynamics - 2
•   Thermal Equilibrium
•   Heat & Thermodynamics
•   Isothermic & Adiabatic
•   Gases Kinetic Theory
•   Gases
•   Ideal Gases - 1
•   Ideal Gases - 2
•   Gases & Reactions
•   Oscillatory Motion - 1
•   Oscillatory Motion - 2
•   Periodic Motion
•   Harmonic Motion - 1
•   Harmonic Motion - 2
•   Harmonic Oscillation
•   Oscillations - 1
•   Oscillations - 2
•   Wave Motion - 1
•   Wave Motion - 2
•   Transverse Waves - 1
•   Tansverse Waves - 2
•   Longitudinal Waves
•   Progressive Waves
•   Travelling Waves
•   Stationary Waves
•   Waves Superposition
•   Reverberation - 1
•   Reverberation - 2
•   Acoustics
•   Beats
•   Sounds & Waves - 1
•   Sounds ans Waves - 2
•   Magnetostriction Effect
•   Michelson Experiment
•   Einstein's Special Theory
•   Lorentz Transformation
•   Velocities Law
•   Mass Energy Relation
•   Mass Variation - Velocity
•   Compton Effect
•   Waves
•   Black Body Radiation
•   PhotoElectric Effect
•   X Rays
•   Pair Productions
•   Elastic Waves
•   Schrodinger Equation
•   Linearity & Superposition
•   Schrodinger - Steady State
•   Box Particle
•   Finite Potential Well
•   Tunnel Effect
•   Quantum Number
•   Electron Probability Density
•   Zeeman Effect
•   Raman Effect
•   Maxwell Boltzmann
•   Fermi-Dirac Distribution
•   Bose-Einstein Distribution
•   Dying Stars
•   Cosmology
•   Nuclear Fission Reactor
•   Nuclear Fusion

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Engineering Physics Questions and Answers – Forces of Nature

Posted on May 14, 2017 by staff10

This set of Engineering Physics Multiple Choice Questions & Answers (MCQs) focuses on “Forces of Nature”.

1. When we steer a bicycle round a bend with both our hands on the handlebars, we apply a ___________
a) Force
b) Torque
c) Couple
d) Energy
View Answer

Answer: c
Explanation: A pair of equal and opposite forces acting on a body along two different lines of action constitutes a couple. A Couple has a turning effect, but no resultant force acts on a body. When we steer a bicycle round a bend with both our hands on the handlebars, we apple a couple.
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2. Couple cannot produce a translational motion.
a) True
b) False
View Answer

Answer: a
Explanation: A pair of equal and opposite forces acting on a body along two different lines of action constitutes a couple. A couple has a turning effect, but no resultant force acts on a body. Thus it cannot produce translational motion.

3. The areal velocity of a planet is constant. This is stated by ___________
a) Newton’s third law of motion
b) Kepler’s second law of planetary motion
c) Fourier’s law
d) Kirchhoff’s planetary law
View Answer

Answer: b
Explanation: A planet revolves around the sun under the influence of a gravitational force which acts towards the sun. This means that the areal velocity of a planet is constant. The is Kepler’s second law of planetary motion which states that the line joining the planet to the sun sweeps out equal areas in equal intervals of time.

4. The internal torque on the system due to internal force is ___________
a) Increasing
b) Decreasing
c) Constant
d) Zero
View Answer

Answer: d
Explanation: According to Newton’s third law, the internal torque on the system due to internal forces is zero because the forces between any two particles are equal and opposite and directed along the line joining the two particles. Hence the total torque is due to external forces only.

5. Which of the following can execute both translational and rotational motion under the influence of the external field?
a) Rigid body
b) Ideal body
c) Rotating body
d) A body which is stationary
View Answer

Answer: a
Explanation: A rigid body is one for which the distance between different particles does not change, even though they move. Under the influence of an external force, a rigid body can execute rotational and translational motion.
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6. For a body in equilibrium, the linear acceleration of its centre of mass would be zero and also the angular acceleration of the rigid body about any axis would be zero.
a) True
b) False
View Answer

Answer: a
Explanation: A rigid body is in equilibrium if both the linear and angular momentum of the rigid body remains constant with time. Hence for a body on equilibrium, the linear acceleration of its centre of mass would be zero and also the angular acceleration of the rigid body about any axis would be zero.

7. A spring 40mm ling is stretched by the application of force. If 10N force is required to stretch the spring through 1mm, then the work done in stretching the spring through 40mm is?
a) 23J
b) 68J
c) 84J
d) 8J
View Answer

Answer: d
Explanation: Spring constant, k = F/x = 10N/1mm = 10N/(10-3 m)= 104 N/m
Work done in stretching the spring through 40m,
W = 1/2 kx2=1/2×104×(40×10-3)2 = 8J.

8. Two bodies w of masses m and 4m are moving with equal kinetic energies. What is the ratio of their linear momenta?
a) 1:2
b) 1:1
c) 4:1
d) 1:4
View Answer

Answer: a
Explanation: p = √2mE
For same kinetic energy, p1/p2 = √(m1/m2) = √(m/4m)=1:2.

9. Water falls from a height of 60m at the rate of 15kg.s to operate a turbine. The losses due to friction forces are 10% of energy. How much power is generated by the turbine? g=m/s2
a) 7kW
b) 10.2kW
c) 12.3kW
d) 8.1kW
View Answer

Answer: d
Explanation: P = W/t=mgh/t=(15×10×60)/1 = 9000W = 9kW
Loss=10%
Useful power=90% of 9kW = (90×9)/100=8.1kW.

10. A shell explodes into four unequal parts. Which one of the following is conserved?
a) Potential energy
b) Kinetic energy
c) Momentum
d) Both potential and kinetic energy
View Answer

Answer: c
Explanation: In the absence of external force, linear momentum is conserved. If a shell explodes into four equal parts, momentum is conserved.
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Sanfoundry Global Education & Learning Series – Engineering Physics.

To practice all areas of Engineering Physics, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Engineering Physics Questions and Answers – Gravitational and Gravity »
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