MCQ
Zener breakdown takes place if:
  • A
    Doped impurity is low
  • B
    Doped impurity is high
  • C
    Less impurity in N-part
  • D
    Less impurity in P-type

Answer

  1. Doped impurity is high

Explanation:

Zener breakdown occurs due to heavily doped diodes.In this process electrons crosses the barrier from the valence band of the p-type to the conduction band of the lightly filled n-type material.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A coil of wire of resistance 50  is embedded in a block of ice. If a potential difference of 210 V is applied across the coil, the amount of ice melted per second will be

(a) 4.12 gm

(b) 4.12 kg

(c) 3.68 kg

(d) 2.625 gm

The photoelectrons emitted from a metal surface are such that their velocity:

In the given figure, when key K is opened, the reading of the ammeter A will be

(a) 50 A

(b) 2 A

(c) 0.5 A

(d)  

The heat produced by a 100 watt heater in 2 minute will be equal to

(a) 12 

(b) 10  

(c) 6 

(d) 3 

In ballistic galvanometer, the frame on which the coil is wound is non-metallic to

(a) Avoid the production of induced e.m.f.

(b) Avoid the production of eddy currents

(c) Increase the production of eddy currents

(d) Increase the production of induced e.m.f.

A spectral line λ = 5000 Å in the light coming from a distant star is observed as a 5200 Å. What will be recession velocity of the star

(a) 1.15  

(b) 1.15  

(c) 1.15  

(d) 1.15 km/sec

In a situation the contact force by a rough horizontal surface on a body placed on it has constant magnitude. If the angle between this force and the vertical is decreased, the frictional force between the surface and the body will:
  1. Increase.
  2. Decrease.
  3. Remain the saint.
  4. May increase or decrease.
According to classical physics, the kinetic energy K of an electron revolve in orbit of radius $r$ is __________ .
Among identical spheres A and B having charges −15C and −16C:

An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion will be

(a) Straight line along the x-direction

(b) A circle in the xz-plane

(c) A circle in the yz-plane

(d) A circle in the xy-plane