Zener breakdown in a semi-conductor diode occurs when
|
(a) Forward current exceeds certain value |
(b) Reverse bias exceeds certain value |
|
(c) Forward bias exceeds certain value |
(d) Potential barrier is reduced to zero |
(b) Reverse bias exceeds certain value
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A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of 45°. The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible value (s) of n from the following
|
(a) 1.5 |
(b) 1.6 |
(c) 1.3 |
(d) a, b |
If a charged spherical conductor of radius 10 cm has potential V at a point distant 5 cm from its centre, then the potential at a point distant 15 cm from the centre will be
|
(a) |
(b) |
(c) |
(d) 3V |
The potential at a point, due to a positive charge of 100μC at a distance of 9m, is
|
(a) |
(b) |
(c) |
(d) |
