- 1(current)
Q. No.Two small current-carrying loops carrying currents in the clockwise direction are placed in the same plane, separated by a distance \(d\) (which is much larger than the size of the loops). The two loops:
| 1. | attract each other. |
| 2. | repel each other. |
| 3. | exert no force on each other, but exert a torque. |
| 4. | neither exert any force nor any torque on each other. |
Subtopic: Â Current Carrying Loop: Force & Torque |
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A circular coil of radius \(r\) carries a current \(i\) and is placed in a uniform magnetic field \(B,\) with its plane parallel to the field. The magnitude of the torque acting on the coil is:
| 1. | zero | 2. | \(2\pi r i B\) |
| 3. | \(\pi r^2i B\) | 4. | \(2\pi r^2i B\) |
Subtopic: Â Current Carrying Loop: Force & Torque |
From NCERT
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A current-carrying loop has a magnetic moment \(\vec{M}\) and carries a current \(I.\) The loop is placed in a uniform magnetic field \(\vec{B}.\) What is the magnitude of torque acting on the loop if the plane of the loop makes an angle of \(60^\circ\) with the direction of the magnetic field?
1. \(MB~ \text{cos} 60^\circ\)
2. \(MB~ \text{sin} 60^\circ\)
3. \(MB~ \text{tan} 60^\circ\)
4. \(MB~ \text{cot} 60^\circ\)
1. \(MB~ \text{cos} 60^\circ\)
2. \(MB~ \text{sin} 60^\circ\)
3. \(MB~ \text{tan} 60^\circ\)
4. \(MB~ \text{cot} 60^\circ\)
Subtopic: Â Current Carrying Loop: Force & Torque |
From NCERT
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An electric current runs counterclockwise in a rectangular loop around the outside edge of the page, which lies flat on your table. A uniform magnetic field is then turned on, and directed parallel to the page from the top to the bottom. The magnetic force on the page will cause:
| 1. | the left edge to lift up |
| 2. | the right edge to lift up |
| 3. | the top edge to lift up |
| 4. | the bottom edge to lift up |
Subtopic: Â Current Carrying Loop: Force & Torque |
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- 1(current)
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