Exercises

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Simple step-by-step solutions to Exercises questions of Electricity from Living Science Physics 8. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Exercises with Hints & Solutions

MEDIUM
8th ICSE
IMPORTANT

Explain three electrical hazards.

EASY
8th ICSE
IMPORTANT

A fan of 60 W runs for 75 hours in a month. How much electrical energy is consumed?

MEDIUM
8th ICSE
IMPORTANT

An electric kettle rated 2.2 kW works for 4 hour a day. Calculate the number of units produced by it in 20 days.

MEDIUM
8th ICSE
IMPORTANT

A heater is rated at 5 kW. Calculate the cost of energy consumed by it in 30 days. If it is run for 2 hours daily. The cost of 1 kWh is priced at   4.20.

HARD
8th ICSE
IMPORTANT

Five LED bulbs of 8 W each, two fans of 40 W each, an electric motor with 3 kW, and a geyser of 5 kW are used for 8 hours a day by a family. Calculate the total energy consumed in 30 days and the cost of electricity used in one day at the rate of  5 per unit.

MEDIUM
8th ICSE
IMPORTANT

Yashika was given an electroscope with its gold leaves diverged. What do the diverged leaves indicate?  She was also given a rod which she did not know was charged or not. Yashika touched the rod to the cap of the electroscope to find that the divergence of the gold leaf decreased. What should she infer about the charge status of the rod?

MEDIUM
8th ICSE
IMPORTANT

Draw the diagram for identifying the nature of charge of an object using a positively charged electroscope.

MEDIUM
8th ICSE
IMPORTANT

Draw the diagram of a lightning conductor.