Assertion (A): | Mass of a body decreases slightly when it is negatively charged. |
Reason (R): | Charging is due to the transfer of electrons. |
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. | (A) is False but (R) is True. |
Assertion (A): | If electrons in an atom were stationary, then they would fall into the nucleus. |
Reason (R): | Electrostatic force of attraction acts between negatively charged electrons and positive nucleus. |
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. | (A) is False but (R) is True. |
Assertion (A): | If the electric field due to a dipole on its axis line at a distance r is E, then the electric field due to a dipole at the same distance at the equatorial line will be E/2. |
Reason (R): | Electric field due to dipole varies inversely as the square of the distance. |
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): | Electrons in the atom are held due to coulomb forces. |
Reason (R): | The atom is stable only because the centripetal force due to Coulomb's law is balanced by the centrifugal force. |
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 charge \(q\) is placed in a cube of side \(b\). The flux associated with the cube is independent of side length. |
Reason (R): | Gauss's law is independent of the size of the Gaussian surface. |
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. |
Given below are two statements:
Assertion (A): | When charges are shared between any two bodies, no charge is really lost but some loss of energy does occur. |
Reason (R): | Some energy disappears in the form of heat, sparking, etc. |
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. | (A) is False but (R) is True. |
Assertion (A): | Work done in moving a charge between any two points in a uniform electric field is independent of the path followed by the charge between these points. |
Reason (R): | Electrostatic forces are non-conservative. |
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. | (A) is False but (R) is True. |
Assertion (A): | Electrons move from a region of higher potential to a region of lower potential. |
Reason (R): | An electron has less potential energy at a point where potential is higher and vice-versa. |
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. | (A) is false but (R) is true. |
Assertion (A): | If a proton and an electron are placed in the same uniform electric field then they experience different accelerations. |
Reason (R): | Electric force on a test charge is independent of its mass. |
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. | (A) is false but (R) is true. |
Assertion (A): | If two charged bodies placed near each other attract each other then they must be oppositely charged. |
Reason (R): | Unlike charges repel each other and like charges attract each other. |
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. |