Assertion (A): | To float, a body must displace liquid whose weight is greater than the actual weight of the body. |
Reason (R): | During floating, the body will experience no net downward force in that case. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Assertion (A): | A ship floats higher in the water on a high-pressure day than on a low-pressure day. |
Reason (R): | Floating of ship in the water is not possible because of buoyancy force which is present due to pressure difference. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | A needle placed carefully on the surface of the water may float, whereas a ball of the same material will always sink. |
Reason (R): | The buoyancy of an object depends both on the material and shape of the object. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | A hydrogen-filled balloon stops rising after it has attained a certain height in the sky. |
Reason (R): | The atmospheric pressure decreases with height and becomes zero when maximum height is attained. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |