On increasing the reverse bias to a large value in a PN-junction diode, current
| (a) Increases slowly | (b) Remains fixed |
(c) Suddenly increases |
(d) Decreases slowly |
On increasing the reverse bias to a large value in a PN-junction diode, current
| (a) Increases slowly | (b) Remains fixed |
(c) Suddenly increases |
(d) Decreases slowly |
(c) Suddenly increases
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A primary cell has an e.m.f. of 1.5 volts, when short-circuited it gives a current of 3 amperes. The internal resistance of the cell is
|
(a) 4.5 ohm |
(b) 2 ohm |
(c) 0.5 ohm |
(d) 1/4.5 ohm |
The reading of the ammeter as per figure shown is
|
(a) |
(b) |
(c) |
(d) 2 A |
The process of adding impurities to the pure semiconductor is called
|
(a) Drouping |
(b) Drooping |
(c) Doping |
(d) None of these |
$\frac{\text{v}}{4}$
$\frac{\text{v}}{2}$
$\text{v}$
$2\text{v}$
An electron is projected along the axis of a circular conductor carrying some current. Electron will experience force
|
(a) Along the axis |
(b) Perpendicular to the axis |
|
(c) At an angle of 4o with axis |
(d) No force experienced |
In a P-type semiconductor
|
(a) Current is mainly carried by holes |
|
(b) Current is mainly carried by electrons |
|
(c) The material is always positively charged |
|
(d) Doping is done by pentavalent material |