- AZero bias
- BReverse bias
- CForward bias
- DInfinite bias
Explanation:
We know that zener diode works on the reverse bias. When the reverse bias is equal to the break-down voltage, the voltage across the zener remains almost constant and the current increases rapidly.
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A piece of fuse wire melts when a current of 15 ampere flows through it. With this current, if it dissipates 22.5 W, the resistance of fuse wire will be
|
(a) Zero |
(b) 10 Ω |
(c) 1 Ω |
(d) 0.10 Ω |
An object is at a distance of 0.5 m in front of a plane mirror. Distance between the object and image is
|
(a) 0.5 m |
(b) 1 m |
(c) 0.25 m |
(d) 1.5 m |
Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be
|
(a) 3 |
(b) 6 |
(c) 5 |
(d) 2 |
An oil drop having charge 2e is kept stationary between two parallel horizontal plates 2.0 cm apart when a potential difference of 12000 volts is applied between them. If the density of oil is 900 kg/m3, the radius of the drop will be
|
(a) 2.0 |
(b) 1.7 |
(c) 1.4 |
(d) 1.1 |
Two protons exerts a nuclear force on each other, the distance between them is
|
(a) |
(b) |
(c) |
(d) |