EASY
10th CBSE
IMPORTANT
Earn 100

100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?

Important Questions on Electricity

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Long Answer Type Questions>Q 21
(a) Derive the expression for the heat produced due to a current ‘I' flowing for a time interval ‘t’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. With which name is this relation known?
(b) How much heat will an instrument of 12 W produce in one minute if it is connected to a battery of 12 V?
(c) The current passing through a room heater has been halved. What will happen to the heat produced by it?
(d) What is meant by the heating effect of current? Give two applications of the heating effect of current.
(e) Name the material which is used for making the filaments of an electric bulb.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 22
The heat produced by passing an electric current through a fixed resistor is proportional to the square of:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 23
The current passing through an electric kettle has been doubled. The heat produced will become:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 24
An electric fuse works on the principle of:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 25
The elements of electrical heating devices are usually made of:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 26
The heat produced in a wire of resistance 'x' when a current 'y' flows through it in time 'z' is given by
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 27
Which of the following characteristics is not suitable for a fuse wire?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 1 - Electricity>Multiple Choice Questions (MCQs)>Q 28
In a filament type light bulb, most of the electric power consumed appears as: