11)

Coulomb is the SI unit of:

Class 10 Physics

A)

charge

B)

current

C)

potential difference

D)

resistance

12)

When electric current is passed, electrons move from:

Class 10 Physics

A)

high potential to low potential.

B)

low potential to high potential.

C)

in the direction of the current.

D)

against the direction of the current.

13)

 The heating element of an electric iron is made up of:

Class 10 Physics

A)

copper

B)

nichrome

C)

aluminium

D)

iron

14)

The electrical resistance of insulators is

Class 10 Physics

A)

high

B)

low

C)

zero

D)

 infinitely high

15)

Electrical resistivity of any given metallic wire depends upon

Class 10 Physics

A)

its thickness

B)

its shape

C)

 nature of the material

D)

 its length

16)

 Electric power is inversely proportional to

Class 10 Physics

A)

resistance

B)

voltage

C)

current

D)

temperature

17)

What is the commercial unit of electrical energy?

Class 10 Physics

A)

Joules

B)

Kilojoules

C)

Kilowatt-hour

D)

Watt-hour

18)

An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

Class 10 Physics

A)

440 W

B)

110 W

C)

55 W

D)

155 W

E)

75 W

19)

Which of the following gases are filled in electric bulbs?

Class 10 Physics

A)

Helium and Neon

B)

Neon and Argon

C)

Argon and Hydrogen

D)

Argon and Nitrogen

20)

100 J of heat is produced each second in a 4Ω resistor. The potential difference across the resistor will be:

Class 10 Physics

A)

30 V

B)

10 V

C)

11 V

D)

12 V

E)

13 V