Assertion (A): | Susceptibility is defined as the ratio of intensity of magnetization \(I\) to magnetic intensity \(H\). |
Reason (R): | Greater the value of susceptibility, smaller the value of the intensity of magnetization \(I\). |
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. |
The magnetization of a piece of iron or steel:
1. | depends on the strength of the magnetizing field. |
2. | depends on external conditions such as temperature. |
3. | cannot be done beyond the saturation point. |
4. | all of these. |
1. | A/m | 2. | Am |
3. | Am2 | 4. | tesla |
1. | material \(A\) is preferred for making electromagnets. |
2. | material \(B\) is preferred for making permanent magnets. |
3. | material \(A\) is preferred for using electric generators and transformers. |
4. | all of these. |
When a magnetic material is subjected to a very small magnetising force \(H,\) the intensity of magnetisation is proportional to:
1. | \(\frac{1}{\sqrt{H}} \) | 2. | \(\sqrt{H} \) |
3. | \(H \) | 4. | \(H^2\) |
A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by:
1. | 2. | ||
3. | 4. |
The magnetic moment of a magnet \((10 ~\text{cm}\times 4~\text{cm}\times1~\text{cm})\) is \(4 ~\text{Am}^2\). Its intensity of magnetisation is:
1. \(10^{3}\) A/m
2. \(10^{2}\) A/m
3. \(10^{5}\) A/m
4. \(10^{4}\) A/m
S.I. unit of intensity of magnetization is:
1. | Ampere-metre | 2. | Ampere-metre2 |
3. | Ampere/metre | 4. | Ampere/metre2 |