Q. No.Which of the following four graphs may best represent the current-deflection relation in a tangent galvanometer?
1. a
2. b
3. c
4. d
A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled, the deflection will
1. increase
2. decrease
3. remain unchanged
4. either increase or decrease.
Consider the following statements:
| (a) | The magnetic field is produced only by electric charges. |
| (b) | Magnetic poles are only mathematical assumptions having no real existence. |
| (c) | A north pole is equivalent to a clockwise current and a south pole is equivalent to an anticlockwise current. |
| (d) | A bar magnet is equivalent to a long, straight current. |
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 |
A horizontal circular loop carries a current that looks clockwise when viewed from above. It is replaced by an equivalent magnetic dipole consisting of a south pole \(S\) and a north pole \(N.\)
| (a) | The line \(SN\) should be along the diameter of the loop. |
| (b) | The line \(SN\) should be perpendicular to the plane of the loop. |
| (c) | The south pole should be below the loop. |
| (d) | The north pole should be below the loop |
Choose the correct option from the given ones:
1. (a) and (b) only
2. (b) and (d) only
3. (c) and (d) only
4. (a) and (d) only
| a. | P1 and P2 |
| b. | Q1 and Q2 |
| c. | P1 and Q1 |
| d. | P2 and Q2 |
Choose the correct option:
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)
Consider the situation of the previous problem. The directions of the magnetic field due to the dipole are opposite at
(a) P1 and P2
(b) Q1 and Q2
(c) P1 and Q1
(d) P2 and Q2
Choose the correct option
1. (a) , (b)
2. (b) , (c)
3. (c) , (d)
4. (a) , (d)
Previous problem: Consider a magnetic dipole kept in the north-south direction. Let P1, P2 Q1, Q2 be four points at the same distance from the dipole towards north, south, east and west of the dipole respectively.
To measure the magnetic moment of a bar magnet, one may use
(a) a tangent galvanometer
(b) a deflection galvanometer if the earth’s horizontal field is known
(c) an oscillation magnetometer if the earth’s horizontal field is known
(d) both deflection and oscillation magnetometer if the earth’s horizontal field is not known
Choose the correct option
1. (a) , (b) , (c)
2. (b) , (c) , (d)
3. (c) , (d) , (a)
4. (a) , (d) , (b)
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: 304678
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: 304678
A paramagnetic material is placed in a magnetic field. Consider the following statements:
| A: | If the magnetic field is increased, the magnetization is increased. |
| B: | If the temperature is increased, the magnetization is increased. |
| 1. | Both A and B are true |
| 2. | A is true but B is false |
| 3. | B is true but A is false |
| 4. | Both A and B are false |
A paramagnetic material is kept in a magnetic field. The field is increased till the magnetization becomes constant. If the temperature is now decreased, the magnetization:
| 1. | will increase |
| 2. | decrease |
| 3. | remain constant |
| 4. | may increase or decrease |
A ferromagnetic material is placed in an external magnetic field. The magnetic domains:
| 1. | increase in size |
| 2. | decrease in size |
| 3. | may increase or decrease in size |
| 4. | have no relation with the field |
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