- ADue to rupture of bonds
- BResistance of deplection layer becomes less
- CDue to high doping
- DDue to less doping
Explanation:
When Zener diode is connected in reverse bias, as applied voltage reaches at Zener breakdown voltage, due to rupture of bonds there is a sudden increase in current in Zener diode.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The V-i graph for a conductor at temperature and
are as shown in the figure. (
is proportional to
|
(a) cos2θ |
(b) sin θ |
(c) cot 2θ |
(d) tan θ |
The equivalent quantity of mass in electricity is
|
(a) Charge |
(b) Potential |
(c) Inductance |
(d) Current |
An ideal transformer has 500 and 5000 turn in primary and secondary windings respectively. If the primary voltage is connected to a 6V battery then the secondary voltage is
|
(a) 0 |
(b) 60 V |
(c) 0.6 V |
(d) 6.0 V |
The activity of a radioactive sample is 1.6 curie and its half-life is 2.5 days. Its activity after 10 days will be
|
(a) 0.8 curie |
(b) 0.4 curie |
(c) 0.1 curie |
(d) 0.16 curie |
If a rod has resistance 4 W and if rod is turned as half cycle then the resistance along diameter
|
(a) 1.56 W |
(b) 2.44 W |
(c) 4 W |
(d) 2 W |
A small coil of N turns has area A and a current I flows through it. The magnetic dipole moment of this coil will be
|
(a) NI/A |
(b) |
(c) |
(d) NIA |
Two identical metal plates show photoelectric effect by a light of wavelength
falls on plate A and
on plate B (
. The maximum kinetic energy is
|
(a) 2 |
(b) |
(c) |
(d) |
In a hydrogen discharge tube it is observed that through a given cross-section 3.13 electrons are moving from right to left and 3.12
protons are moving from left to right. What is the electric current in the discharge tube and what is its direction
|
(a) 1 mA towards right |
(b) 1mA towards left |
|
(c) 2mA towards left |
(d) 2mA towards right |
A beam of ions with velocity 2
enters normally into a uniform magnetic field of 4
If the specific charge of the ion is 5
, then the radius of the circular path described will be
|
(a) 0.10 m |
(b) 0.16 m |
(c) 0.20 m |
(d) 0.25 m |