MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A horizontal platform is rotating with uniform angular velocity ω around the vertical axis passing through its centre. At some instant of time, a viscous liquid of mass m is dropped at the centre and is allowed to spread pout and finally fall. The angular velocity during this period ___________ |
| A. | Decreases continuously |
| B. | Decreases initially and increases again |
| C. | Remains unaltered |
| D. | Increases continuously |
| Answer» C. Remains unaltered | |
| 2. |
In a bicycle the radius of rear wheel is twice the radius of the front wheel. If rf and rr are the radii vf and vr are the speeds of top most points of wheels, then? |
| A. | vr=2vf |
| B. | vf=2vr |
| C. | vr=vf |
| D. | vr is lesser than vf |
| Answer» D. vr is lesser than vf | |
| 3. |
A thin circular ring of mass m and radius R is rotating about its axis with a constant angular velocityω. Two objects each of mass M are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity ω‘, which is equal to? |
| A. | mω/(m+M) |
| B. | mω/(m+2M) |
| C. | ((m+2m)ω)/m |
| D. | ((m-2M)ω)/((m+2M)) |
| Answer» C. ((m+2m)ω)/m | |