English Medium कक्षा १० - CBSE Question Bank Solutions

Define the unit of current.

Calculate the number of electrons constituting one coulomb of charge.

Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason?

The work done in moving a unit charge across two points in an electric circuit is a measure of ______.

Which of the following units could be used to measure electric charge?

(a) ampere
(b) joule
(c) volt
(d) coulomb

One coulomb charge is equivalent to the charge contained in:

(a) 2.6 × 10¹⁹ electrons
(b) 6.2 × 10¹⁹ electrons
(c) 2.65 × 10¹⁸ electrons
(d) 6.25 × 10¹⁸ electrons

Three 2 V cells are connected in series and used as a battery in a circuit.

1. What is the p.d. at the terminals of the battery?
2. How many joules of electrical energy does 1 C gain on passing through
   1. one cell
   2. all three cells?

Three 2 V cells are connected in series and used as a battery in a circuit. 

How many joules of electrical energy does 1 C gain on passing through (i) one cell (ii) all three cells?

The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity?

By what name is the physical quantity coulomb/second called?

What is the Flow of Charge Called?

What actually travels through the wires when you switch on a light?

Which particles constitute the electric current in a metallic conductor?

 In which direction does conventional current flow around a circuit?

In which direction do electrons flow?

Which of the following equation shows the correct relationship between electrical unit? 

1A = 1C/s or 1c= 1A/s 

What is the unit of electric current?

How many milliamperes as there in 1 ampere?

How many microamperes are there in 1 ampere?

Which of the two is connected in series : ammeter or voltmeter?