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This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
1. |
A spring 40mm long is stretched by the acceleration of a force. If 10N force is required to stretch the spring through 1mm, then work done in stretching through 40mm is? |
A. | 84J |
B. | 48J |
C. | 24J |
D. | 8J |
Answer» E. | |
2. |
Statement: The time period of a pendulum on a satellite orbiting the earth is infinity.
|
A. | Both statement and reason are true and the reason is the correct explanation of the statement |
B. | Both statement and reason are true but the reason is not the correct explanation of the statement |
C. | Statement is true, but the reason is false |
D. | Statement and reason are false |
Answer» C. Statement is true, but the reason is false | |
3. |
If the length of simple pendulum is tripled, what will be its new time period in terms of original period T? |
A. | 0.7T |
B. | 1.73T |
C. | T/2 |
D. | T |
Answer» C. T/2 | |
4. |
If a particle is oscillating on the same horizontal plane in the ground ___________ |
A. | It has only kinetic energy but no potential energy |
B. | It has only potential energy but no kinetic energy |
C. | It has both kinetic and potential energies |
D. | It has neither kinetic nor potential energies |
Answer» D. It has neither kinetic nor potential energies | |
5. |
A child swinging on a swing stands up. Then the time period of the swing will ___________ |
A. | Increase |
B. | Decrease |
C. | Remain the same |
D. | Increase, if the child is long and decreases if the child is short |
Answer» C. Remain the same | |
6. |
A coin is placed on a horizontal platform, which undergoes vertical simple harmonic motion of angular frequency . The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time. |
A. | For an amplitude of g<sup>2</sup>/ <sup>2</sup> |
B. | For an amplitude of g/ <sup>2</sup> |
C. | At the highest position of the platform |
D. | At the mean position of the platform |
Answer» C. At the highest position of the platform | |
7. |
A simple pendulum has a time period T1, when on the earth s surface; and T2, when taken to a height R above the earth s surface (R is the radius of the earth). The value of T2/T1 is? |
A. | 1 |
B. | 2 |
C. | 4 |
D. | 1 |
Answer» E. | |
8. |
A particle free to move along the x-axis has potential energy given by U(x) = k [1-exp -x2] for - x + , where k is a positive constant of appropriate dimensions. Then? |
A. | The particle is in unstable equilibrium at points away from the origin |
B. | There is a force directed away from the origin for any finite nonzero value of x |
C. | It has its minimum kinetic energy at the origin if its total mechanical energy is k/2 |
D. | The motion is simple harmonic for small displacement from x=0 |
Answer» E. | |
9. |
A particle executes simple harmonic motion between x = -A and x = +A. The time taken for it to go from 0 to A/2 is T1 and to go from A/2 to A is T2. Then? |
A. | T<sub>1</sub> < T<sub>2</sub> |
B. | T<sub>1</sub> > T<sub>2</sub> |
C. | T<sub>1</sub>=T<sub>2</sub> |
D. | T<sub>1</sub>=2T<sub>2</sub> |
Answer» B. T<sub>1</sub> > T<sub>2</sub> | |