Q. No.
Mark the correct statements :
(a) The nuclear force between two protons is always greater than the electromagnetic force between them
(b) The electromagnetic force between two protons is always greater than the gravitational force between them
(c) The gravitational force between two protons may be greater than the nuclear force between them
(d) Electromagnetic force between two protons may be greater than the nuclear force acting between them
Choose the correct option:
1. (a), (b) and (c)
2. (b), (c) and (d)
3. (a), (b) and (d)
4. All of these
If all matter were made of electrically neutral particles such as neutrons,
(a) there would be no force of friction
(b) there would be no tension in the string
(c) it would not be possible to sit on a chair
(d) the earth could not move around the sun
Choose the correct option:
1. (a), (b) and (c)
2. (a), (c) and (d)
3. (b), (c) and (d)
4. All of these
Which of the following systems may be adequately described by classical physics?
| a. | motion of a cricket ball |
| b. | motion of a dust particle |
| c. | a hydrogen atom |
| d. | a neutron changing to a proton |
Choose the correct option:
| 1. | (a) and (b) |
| 2. | (b) and (c) |
| 3. | (c) and (d) |
| 4. | (a) and (d) |
The two ends of a spring are displaced along the length of the spring. All displacements have equal magnitudes. In which case or cases the tension or compression in the spring will have a maximum magnitude?
| (a) | The right end is displaced toward the right and the left end is toward the left |
| (b) | both ends are displaced toward the right |
| (c) | both ends are displaced toward the left |
| (d) | the right end is displaced toward the left and the left end is toward the right |
Choose the correct option from the given ones:
| 1. | (a) and (b) only |
| 2. | (b) and (c) only |
| 3. | (c) and (d) only |
| 4. | (a) and (d) only |
Action and reaction
(a) act on two different objects
(b) have equal magnitude
(c) have opposite directions
(d) have resultant zero
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (a), (b) and (c)
4. All of these
A body of weight \(\mathrm{w}_{1}\) is suspended from the ceiling of a room through a chain of weight \(\mathrm{w}_{2}.\)The ceiling pulls the chain by a force:
| 1. | \(\mathrm{w}_{1}\) | 2. | \(\mathrm{w}_{2}\) |
| 3. | \(\mathrm{w}_{1}+\mathrm{w}_{2}\) | 4. | \(\dfrac{\text w_{1}+\text w_{2}}{2}\) |
When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by:
| 1. | the cart on the horse. |
| 2. | the ground on the horse. |
| 3. | the ground on the cart. |
| 4. | the horse on the ground. |
A car accelerates on a horizontal road due to the force exerted by
1. the engine of the car
2. the driver of the car
3. the earth
4. the road
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: 302183
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: 302183
A block of mass \(10\) kg is suspended through two light spring balances as shown in the figure:
| 1. | both the scales will read \(10\) kg. |
| 2. | both the scales will read \(5\) kg. |
| 3. | the upper scale will read \(10\) kg and the lower zero. |
| 4. | the readings may be anything but their sum will be \(10\) kg. |
A block of mass m is placed on a smooth inclined plane of inclination θ with the horizontal. The force exerted by the plane on the block has a magnitude
1. mg
2. mg/cosθ
3. mg cosθ
4. mg tanθ
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