- AForward-biased
- BReverse-biased
- COperating in the breakdown region
- DUnbiased
Explanation:
The zener voltage will be a constant only when it is operating in the breakdown region.
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For a thermocouple, the temperature of inversion is that temperature at which thermo e.m.f. is
|
(a) Zero |
(b) Maximum
|
(c) Minimum |
(d) None of the above |
The amount of substance liberated on electrodes during electrolysis when 1 coulomb of electricity is passed, is
|
(a) Chemical equivalent |
(b) Electrochemical equivalent |
|
(c) Equivalent weight |
(d) One mol |
A spherical conductor of radius 2m is charged to a potential of 120 V. It is now placed inside another hollow spherical conductor of radius 6m. Calculate the potential to which the bigger sphere would be raised
|
(a) 20 V |
(b) 60 V |
(c) 80 V |
(d) 40 V |
The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that

|
(a) Sample X is undoped while samples Y and Z have been doped with a third group and a fifth group impurity respectively |
|
(b) Sample X is undoped while both samples Y and Z have been doped with a fifth group impurity |
|
(c) Sample X has been doped with equal amounts of third and fifth group impurities while samples Y and Z are undoped |
|
(d) Sample X is undoped while samples Y and Z have been doped with a fifth group and a third group impurity respectively |
If a magnet of length 10 cm and pole strength 40 A-m is placed at an angle of 45o in an uniform induction field of intensity 2 × 10–4 T, the couple acting on it is
|
(a) 0.5656 × 10–4 N-m |
(b) 0.5656 × 10–3N-m |
(c) 0.656 × 10–4 N-m |
(d) 0.656 × 10–5 N-m |