Engineering Physics I Mock Test 6

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Question 1 of 10

1. A particle with restoring force proportional to displacement and resisting force proportional to velocity is subjected to a force Fsinωt. If the amplitude of the particle is maximum for ω=ω₁ and the energy of the particle maximum for ω=ω₂, then?

ω₁≠ω₀ and ω₂=ω₀

ω₁=ω₀ and ω₂=ω₀

ω₁≠ω₀ and ω₂≠ω₀

Question 1 of 10

Question 2 of 10

2. The magnitude of acceleration of particle executing simple harmonic motion at the position of maximum displacement is?

Maximum

Zero

Infinity

Minimum

Question 2 of 10

Question 3 of 10

3. Statement: In simple harmonic motion, the motion is to and fro and periodic.
Reason: Velocity of the particle,
v=ω√(a²-x²)
Where x is displacement.

Statement is true, but the reason is false

Statement and reason are false

Both statement and reason are true but the reason is not the correct explanation of the statement

Both statement and reason are true and the reason is the correct explanation of the statement

Question 3 of 10

Question 4 of 10

4. An ant is walking on the horizontal surface. The number of degrees of freedom of ant will be ___________

Question 4 of 10

Question 5 of 10

5. If a spring of mass 30kg has a spring constant of 15N/m, then its time period is ___________

2πs

2√2 πs

2√2π s

2√2 s

Question 5 of 10

Question 6 of 10

6. The absolute zero is the temperature, at which?

All substances exist in a solid state

Molecular motion ceases

Solid melts

Water freezes

Question 6 of 10

Question 7 of 10

7. A vessel contains a mixture of 1 mole of oxygen and 2 moles of nitrogen at 300 K. The ratio of the average rotational kinetic energy per O₂ molecule to that per N₂ molecule is?

1: 2

2:1

1:1

Depends on the moment of inertia of the two molecules

Question 7 of 10

Question 8 of 10

8. A body executes simple harmonic motion. The potential energy, the kinetic energy and total energy are measured as a function of displacement x. Which of the following statements is true?

Total energy is zero, when x = 0

Potential energy is maximum when x = 0

Kinetic energy is maximum when x is maximum

Kinetic energy is maximum when x = 0

Question 8 of 10

Question 9 of 10

9. A particle executes simple harmonic motion with an angular velocity of 3.5 rad/sec and maximum velocity acceleration 7.5 m/s² respectively. What is the amplitude of oscillations?

0.28m

Zero

0.36m

0.707m

Question 9 of 10

Question 10 of 10

10. A lightly damped oscillator with a frequency v is set in motion by a harmonic driving force of frequency v'. When v' is lesser than v, then the response of the oscillator is controlled by ___________

Oscillator frequency

Spring constant

Damping coefficient

Inertia of the mass

Question 10 of 10