Engineering Physics I Mock Test 6

10%

Question 1 of 10

1. In case of a forced vibration, the resonance wave becomes very sharp when the ___________

Applied periodic force is small

Restoring force is small

Quality factor is small

Damping force is small

Question 1 of 10

Question 2 of 10

2. A particle executes simple harmonic motion of amplitude A. At what distance from the mean position is its kinetic energy equal to its potential energy?

0.51A

0.81A

0.61A

0.71A

Question 2 of 10

Question 3 of 10

3. The phase difference between the acceleration of a particle executing simple harmonic motion and the instantaneous velocity is?

Zero

0.707π

0.5π

Question 3 of 10

Question 4 of 10

4. Which one of the following represents simple harmonic motion?

Acceleration = k(x+a)

Acceleration = k₀ x+k₁ x²

Acceleration = kx

Acceleration = -k(x+a)

Question 4 of 10

Question 5 of 10

5. 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

ω₁≠ω₀ and ω₂=ω₀

Question 5 of 10

Question 6 of 10

6. A loaded vertical spring executes simple harmonic motion with a time period of 4 sec. The difference between the kinetic energy and potential energy of this system varies with a period of?

1 sec

2 sec

8 sec

4 sec

Question 6 of 10

Question 7 of 10

7. A simple pendulum is executing simple harmonic motion with a time period T. If the length of the pendulum is increased by 21%, the increase in the time period of the pendulum of increased length is?

21%

30%

10%

50%

Question 7 of 10

Question 8 of 10

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

2πs

2√2 s

2√2 πs

2√2π s

Question 8 of 10

Question 9 of 10

9. If the period of oscillation of mass m suspended from a spring is 2s, then the period of mass 4m will be ___________

16s

Question 9 of 10

Question 10 of 10

10. A coin is placed on a horizontal platform, which undergoes vertical simple harmonic motion of angular frequency ω. The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time.

For an amplitude of g/ω²

For an amplitude of g²/ω²

At the highest position of the platform

At the mean position of the platform

Question 10 of 10