- A$\text{zero}$
- B$\pi$
- C$\frac{\pi}{4}$
- D$\frac{\pi}{2}$
Explanation:
In the above image waveform of current and voltage in puerly inductive circuit with time is shown.
It is clear from the image that current lags voltage by 90°.
Hence phase angle between current and voltage in purely inductive circuit is $\frac{\pi}{2}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The self inductance of a coil is 5 henry, a current of 1 amp change to 2 amp within 5 second through the coil. The value of induced e.m.f. will be
|
(a) 10 volt |
(b) 0.10 volt |
(c) 1.0 volt |
(d) 100 volt |
Figure represents a glass plate placed vertically on a horizontal table with a beam of unpolarised light falling on its surface at the polarising angle of 57o with the normal. The electric vector in the reflected light on screen S will vibrate with respect to the plane of incidence in a
|
(a) Vertical plane |
|
(b) Horizontal plane |
|
(c) Plane making an angle of 45o with the vertical |
|
(d) Plane making an angle of 57o with the horizontal |

A 10 ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
|
(a) 1310 W |
(b) 670 W |
(c) 810 W |
(d) 1210 W |
A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point p a distance from the centre of the shell is
|
(a) |
(b) |
(c) |
(d) |
In a concave mirror experiment, an object is placed at a distance from the focus and the image is formed at a distance
from the focus. The focal length of the mirror would be
|
(a) |
(b) |
(c) |
(d) |