set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

The active component in an IC are

a) Capacitors

b) Transistors and diodes

c) Resistors

d) None of these

Question : 2

Einstein’s photoelectric equation states that hν = $W_0 + E_k$ in this equation, $E_k$ refers to the

a) Mean kinetic energy of the emitted electrons

b) Maximum kinetic energy of the emitted electrons

c) Kinetic energy of all the emitted electrons

d) Minimum kinetic energy of the emitted electrons

Question : 3

________ is used as a fuel in space ships.

a) Alcohol

b) Petrol

c) Hydrogen

d) Diesel

Question : 4

The neutron, proton, electron and alpha particle are moving with equal kinetic energies. How can the particles be arranged in the increaseing order of their velocities?

a) proton-electron-neutron-alpha paraticle

b) electron-proton-neutron-alpha paraticle

c) alpha particle-neutron-proton- electron

d) neutron-proton-electron-alpha paraticle

Question : 5

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to :

1. Supply hot water to residential buildings.
2. Supply water for minor irrigation projects.
3. Provide street lighting.
4. Electrify a cluster of villages and small towns.

a) 2 and 4 are correct

b) 1 and 3 are correct

c) 1, 2, 3 and 4 are correct

d) 1, 2 and 3 are correct

Question : 6

The waves used in telecommunication are

a) UV

b) Microwave

c) IR

d) Cosmic rays