- 1(current)
Q. No.Two infinitely long parallel conducting wires \(A\) and \(B\) carry currents \(I\) and \(2I,\) respectively, in the same direction. The wire \(A\) has a uniform mass per unit length \(\lambda\) and lies on an insulated floor. The wire \(B\) is kept fixed at a height \(h\) above the floor. The minimum magnitude of \(h\) so that the wire \(A\) does not rise from the floor is:
1. \( \dfrac{4\mu_0 I^2}{\pi \lambda g} \)
2. \( \dfrac{\mu_0 I^2}{2\pi \lambda g} \)
3. \( \dfrac{\mu_0 I^2}{\pi \lambda g} \)
4. \( \dfrac{2\mu_0 I^2}{\pi \lambda g} \)
1. \( \dfrac{4\mu_0 I^2}{\pi \lambda g} \)
2. \( \dfrac{\mu_0 I^2}{2\pi \lambda g} \)
3. \( \dfrac{\mu_0 I^2}{\pi \lambda g} \)
4. \( \dfrac{2\mu_0 I^2}{\pi \lambda g} \)
Subtopic: Â Force between Current Carrying Wires |
Level 3: 35%-60%
NEET - 2026
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Two very long, straight, parallel conductor \(\mathrm{A}\) and \(\mathrm{B}\) carry current of \(5~\text{A}\) and \(10~\text{A}\) respectively and are at a distance of \(10~\mathrm{cm}\) from each other. The direction of the current in the two conductors is the same. The force acting per unit length between two conductors is:
(\(\mu_0=4\pi \times 10^{-7}\) SI unit)
(\(\mu_0=4\pi \times 10^{-7}\) SI unit)
| 1. | \(2\times10^{-4}~\text{Nm}^{-1}\) and is attractive |
| 2. | \(2\times10^{-4}~\text{Nm}^{-1}\) and is repulsive |
| 3. | \(1\times10^{-4}~\text{Nm}^{-1}\) and is attractive |
| 4. | \(1\times10^{-4}~\text{Nm}^{-1}\) and is repulsive |
Subtopic: Â Force between Current Carrying Wires |
 76%
Level 2: 60%+
NEET - 2022
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- 1(current)
Q. No.
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