CBSE - Electricity

1 Electricity What is the measuring equipment called that measures the electric current passing through conductors?
(1) Wattmeter
(2) Ammeter
(3) Galvanometer
(4) Voltmeter

2 Electricity One Volt is equal to -

(1) 1 Joule
(2) 1 Newton/Coulomb
(3) 1 Joule/Coulomb
(4) 1 Coulomb/Newton

3 Electricity Suppose five resistances, each of 10 ohm, are provided t o you. You are free to get the desired value by combining them. The desired value will lie in between

(1) 2 ohm to 50 ohm
(2) 20 ohm to 40 ohm
(3) 12 ohm to 50 ohm
(4) 10 ohm to 60 ohm

4 Electricity Two wires each carrying current i are shown. The magnetic field at P (midway between the wires) is described by which statement?



(1) Magnetic fields are in opposite direction and net field is equal to zero.
(2) Magnetic fields due to two wires are in the same direction
(3) Magnetic fields are in opposite direct ion but net field is not zero
(4) magnetic fields are in the same direction and equal to two times the field due to one wire.

5 Electricity What is the resistance between the points A and B ?

1) 3/2 Ω
2) 2/3 Ω
3) 1/2 Ω
4) 2 Ω

6 Electricity A comb run through one's dry hair attracts small bits of paper. This is due to :

(1) comb is a good conductor

(2) paper is a good conductor

(3) The atoms in the paper gets polarised by the charged comb

(4) the comb possesses magnetic properties

7 Electricity The power of electric power station is 200 mega watt , the elect rical energy produced by it daily will be

(1) 200 megawatt hour
(2) 4800 megawatt hour
(3) 4800 megawatt
(4) 4800 joule

8 Electricity A certain household has consumed 200 units of energy during a month. Its value in joules will be -

(1) 3.6 × 10¹⁰
(2) 7.2 × 10¹⁰
(3) 3.6 × 10⁸
(4) 7.2 × 10⁸

9 Electricity The value of equivalent resistance between the points A and B in the given circuit, will be –


(1) 6R
(2) 4R/11
(3) 11R/4
(4) R/6

10 Electricity Alloys are commonly used in electrical heat ing devices, like electric iron etc. because -

(1) Alloys have higher resistivity than that of its constituent metals.
(2) Alloys do not burn at higher temperatures.
(3) Alloys do not oxidise at higher temperatures.
(4) All of above.