- AConnecting an inductor in series with the load
- BConnecting a capacitor in series with the load
- CConnecting an inductor in parallel with the load
- DConnecting a capacitor in parallel with the load
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Three capacitors of capacitances 3 μF, 9μF and 18 μF are connected once in series and another time in parallel. The ratio of equivalent capacitance in the two cases
will be
|
(a) 1 : 15 |
(b) 15 : 1 |
(c) 1 : 1 |
(d) 1 : 3 |
A steady current i flows in a small square loop of wire of side L in a horizontal plane. The loop is now folded about its middle such that half of it lies in a vertical plane. Let and
respectively denote the magnetic moments due to the current loop before and after folding. Then
|
(a) |
(b) |
|
(c) |
(d) |
In a hydrogen atom, an electron moves in a circular orbit of radius 5.2 and produces a magnetic induction of 12.56 T at its nucleus. The current produced by the motion of the electron will be (Given
|
(a) 6.53 |
(b) 13.25 |
|
(c) 9.6 |
(d) 1.04 |
$\frac{\triangle\text{l}}{\text{l}}$
$\Big(\frac{\triangle\text{l}}{\text{l}}\Big)^2$
$\sqrt{\frac{\triangle\text{l}}{\text{l}}}$
None of these.
The correct curve between the magnetic induction (B) along the axis of a long solenoid due to current flow i in it and distance x from one end is
|
(a) |
(b) |
(c) |
(d) |
The north pole of a magnet is brought near a metallic ring. The direction of the induced current in the ring will be
|
(a) Clockwise |
(b) Anticlockwise |
(c) Towards north |
(d) Towards south |