Question

In a junction diode, the holes are due to

(a) Protons

(b) Neutrons

(c) Extra electrons

(d) Missing of electrons

Answer

(d) Missing of electrons

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 reaction between a proton and  that produces  must also liberate

(a)  

(b)  

(c)  

(d)  

When objects at different distances are seen by the eye, which of the following remain constant?
  1. The focal length of the eye-lens.
  2. The object-distance from the eye-lens.
  3. The radii of curvature of the eye-lens.
  4. The image-distance from the eye-lens.
Ionization energy of a hydrogen-like ion A is greater than that of another hydrogen-like ion B. Let r, u, E and L represent the radius of the orbit, speed of the electron, energy of the atom and orbital angular momentum of the electron respectively. In ground state:

According to modern astronomers into how many constellations, the whole sky is divided

(a) 1011

(b) 88

(c) 880

(d) 5000

Three capacitors of capacitances $6\mu\text{F}$ each are available. The minimum and maximum capacitances, which may be obtained are:
  1. $6\mu\text{F},\ 18\mu\text{F}$
  2. $3\mu\text{F},\ 12\mu\text{F}$
  3. $2\mu\text{F},\ 12\mu\text{F}$
  4. $2\mu\text{F},\ 18\mu\text{F}$
Cathode rays are passing through a discharge tube. In the tube, there is:

Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface

(a) 4000 Å, 7500 Å

(b) 5500 Å, 6000 Å

(c) 4000 Å, 6000 Å

(d) None of these

If the equivalent resistance is to be increased, then the number of resistances should be connected in:

The correct curve between the stopping potential (V) and intensity of incident light (I) is

(a)

(b)

(c)

(d)

What is the time taken (in seconds) to cross a glass of thickness 4 mm and μ = 3 by light

(a) 4  

(b) 2  

(c) 16  

(d) 8