EASY
10th CBSE
IMPORTANT
Earn 100

Define kWh.

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 19
What is the difference between kilowatt and kilowatt hour?
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 20
Why does the cord of an electric heater not glow while the heating element does? 
EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 21

(a) What material is used in making the filament of an electric bulb?

(b) Name the characteristics which make it suitable for this.

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 22
Which gas is filled in the electric bulb and why?
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 23

Answer the following question regarding an electric heater:

Why is the heating coil placed in a circular porcelain plate?

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 23

Answer the following question regarding an electric heater:

Why does heating coil not produce any visible light?

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 24

Amongst the units given below, which units are of electric energy?

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 3 - Electricity>Assignment-7>Q 24

Amongst the units given below, which units are of electric power?