Question

3. MCB stands for
(a) miniature current breaker
(c) miniature circuit breaker
(b) miniature current blocker
(d) miniature circuit blocker
4. 1W=
(a) is
(b) 13 s-1
(c) 11-15
(d) 4.2151
5. Which of these is not true for an atom?
(a) An atom consists of three parts.
(b) The nucleus of an atom comprises of protons and neutrons.
(c) The electrons revolve around the nucleus along elliptical paths in orbits.
(d) Both (a) and (c)
6. Conductors have
(a) no free electrons
(b) a few number of free electrons.
(c) a large number of free protons.
(d) a large number of free electrons.
7. Which of the following is not a method of charging an electrically neutral body?
(a) Friction
(b) Conduction (c) Convection (d) Induction
8. Which of these is not true about a thundercloud?
(a) Charges within a thundercloud get separated due to water vapour.
(b) A thundercloud carries static charges.
(c) The upper part of the cloud carries positive charges.
(d) The lower part of the cloud carries negative charges.
D. Match the columns.
Column A
Column B
(a) Kilowatt
1. Electrical energy​

Answer 1

Answer:

3) miniature current breaker

4)11-5

5)both a & c

Answer 2

Answer:

MCB=d

electrical energy= electrons