- AVolt
- BVolt per metre
- CVolt metre
- DNone of these
Explanation:
E.m.f of a cell is defined as the maximum potential difference across the cell when no current flows through the circuit.
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Ratio of magnetic intensities for an axial point and a point on broad side-on position at equal distance d from the centre of magnet will be or The magnetic field at a distance d from a short bar magnet in longitudinal and transverse positions are in the ratio
| (a) 1 : 1 | (b) 2 : 3 | (c) 2 : 1 | (d) 3 : 2 |
Electron volt is a unit of
|
(a) Potential |
(b) Charge |
(c) Power |
(d) Energy |

A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle 2θ. The earth’s magnetic field component in the direction perpendicular to swing is B. Maximum potential difference induced across the pendulum is

|
(a) 2BL sin |
(b) BL sin |
|
(c) BL sin |
(d) 2BL sin |
In comparison to a half wave rectifier, the full wave rectifier gives lower
|
(a) Efficiency |
(b) Average dc |
|
(c) Average output voltage |
(d) None of these |
The wavelength of de-Broglie wave is 2mm, then its momentum is (h = 6.63 × 10–34 J-s)
|
(a) 3.315 × 10–28 kg-m/s |
(b) 1.66 × 10–28 kg-m/s |
(c) 4.97 × 10–28 kg-m/s |
(d) 9.9 × 10–28 kg-m/s |