Entry Test MCQ :: Circular Motion
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| 1. |
The rotational K.E of hoop is equal to the |
| A. |
its translational K.E |
B. |
half than its translational K.E |
| C. |
double than its translational K.E |
D. |
four times than its translational K.E |
Answer: Option A
Explanation:
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| 2. |
A hoop and disc have same mass and radius. Their rotational K.E are related by an equation |
| A. |
K.Ehoop = K.Edisc |
B. |
K.Ehoop = 2K.Edisc |
| C. |
K.Ehoop = 1/2K.Edisc |
D. |
K.Ehoop = 4K.Edisc |
Answer: Option B
Explanation:
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| 3. |
The critical speed of an artificial satellite is |
| A. |
8 Kms-1 |
B. |
8.1 Kms-1 |
| C. |
7.9 Kms-1 |
D. |
8 ms-1 |
Answer: Option C
Explanation:
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| 4. |
Geo-stationary satellite completes one rotation around earth in |
| A. |
3 hours |
B. |
6 hours |
| C. |
12 hours |
D. |
24 hours |
Answer: Option D
Explanation:
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| 5. |
Radius of geo-stationary orbit from center of earth is nearly |
| A. |
42000km |
B. |
36000km |
| C. |
24000 km |
D. |
18000 km |
Answer: Option A
Explanation:
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| 6. |
According to Einstein the gravity interaction is possible between |
| A. |
material objects only |
B. |
material objects and electromagnetic radiation only |
| C. |
electromagnetic radiations |
D. |
none of the above |
Answer: Option B
Explanation:
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| 7. |
One radian is equal to |
Answer: Option B
Explanation:
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| 8. |
The period of a circular motion is given by |
| A. |
T = rV |
B. |
T = ?w |
| C. |
T = 2?? |
D. |
T = 2?/? |
Answer: Option D
Explanation:
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| 9. |
The direction of linear velocity of body moving in a circle is |
| A. |
along the axis of rotation |
B. |
along the tangent |
| C. |
directed towards the center |
D. |
directed away form the center |
Answer: Option B
Explanation:
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| 10. |
When a body moves in a circle, the angle between its linear velocity and angular velocity is always |
Answer: Option C
Explanation:
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