Q. No.
An aluminium sphere is dipped into water at 10°C. If the temperature is increased, the force of buoyancy
1. will increase
2. will decrease
3. will remain constant
4. may increase or decrease depending on the radius of the sphere.
A spinning wheel is brought in contact with an identical wheel spinning at identical speed. The wheels slow down under the action of friction. Which of the following energies of the first wheel decrease?
| (a) | kinetic |
| (b) | total |
| (c) | mechanical |
| (d) | internal |
Choose the correct option :
| 1. | (a), (b) |
| 2. | (a), (c) |
| 3. | (c), (d) |
| 4. | (a), (d) |
A spinning wheel \(A\) is brought in contact with another wheel \(B\) initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel \(B\) increase?
| (a) | Kinetic energy |
| (b) | Total energy |
| (c) | Mechanical energy |
| (d) | Internal energy |
| 1. | (a) and (b) only |
| 2. | (a) and (c) only |
| 3. | (c) and (d) only |
| 4. | All of these |
A body A is placed on a railway platform and an identical body B in a moving train. Which of the following energies of B are greater than those of A as seen from the ground ?
| (a) | kinetic |
| (b) | total |
| (c) | mechanical |
| (d) | internal |
Choose the correct option :
| 1. | (a), (b), (c) |
| 2. | (a), (c), (d) |
| 3. | (c), (d), (a) |
| 4. | (a), (d), (c) |
In which of the following pairs of temperature scales, the size of a degree is identical?
| (a) | mercury scale and ideal gas scale |
| (b) | Celsius scale and mercury scale |
| (c) | Celsius scale and ideal gas scale |
| (d) | ideal gas scale and absolute scale. |
Choose the correct option:
1. (a), (b)
2. (a), (c)
3. (c), (d)
4. (a), (d)
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 302754
Sorry!! currently, the explanation for the question is not provided. If you need further help, please email at support@neetprep.com with subject: Explanation Missing for Question Id: 302754
A solid object is placed in water contained in an adiabatic container for some time. The temperature of water falls during the period and there is no appreciable change in the shape of the object. The temperature of the solid object.
| (a) | must have increased |
| (b) | must have decreased |
| (c) | may have increased |
| (d) | may have remained constant. |
Choose the correct option
| 1. | (a), (b) |
| 2. | (a) only |
| 3. | (c), (d) |
| 4. | (a), (d) |
As the temperature is increased, the time period of a pendulum
| (a) | increases proportionately with temperature |
| (b) | increases |
| (c) | decreases |
| (d) | remains constant |
Choose the correct option
| 1. | (b) only |
| 2. | (a), (c) |
| 3. | (c), (d) |
| 4. | (a), (d) |
There is some liquid in a closed bottle. The amount of liquid is continuously decreasing. The vapour in the remaining part
1. must be saturated
2. must be unsaturated
3. may be saturated
4. there will be no vapour.
There is some liquid in a closed bottle. The amount of liquid remains constant as time passes. The vapour in the remaining part:
| 1. | must be saturated. |
| 2. | must be unsaturated. |
| 3. | maybe unsaturated. |
| 4. | there will be no vapour. |
Vapour is injected at a uniform rate in a closed vessel which was initially evacuated. The pressure in the vessel is:
| 1. | increases continuously |
| 2. | decreases continuously |
| 3. | first increases and then decreases |
| 4. | first increases and then becomes constant. |
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