Page 44 - CHAPTER-1 (Electricity)

CHAPTER 1

ELECTRICITY

Question 2

State the factors on which the heat produced in a current conductor

depends. Give one practical application of this effect.

Question 3

An electric heater of resistance 500 is connected to a mains supply

for 30min. If 15A current flows through the filament of the heater, then

calculate the heat energy produced in the heater.

Question 4

A fuse wire consists of an alloy of lead and tin. Why?

Question 5

Why are electric bulbs filled with chemically inactive nitrogen and

argon?

Question 6

Power of a lamp is 60W. Find the energy in joules consumed by it in

1s.

Mental floss!

In series, a device of higher power rating consumes less power.

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