MEDIUM
Earn 100

A fuse wire is an alloy of lead and _____ (tin/iron).

50% studentsanswered this correctly

Important Questions on Electric Current and Its Effects

MEDIUM
Draw any four symbols of the components used in electric circuit.
EASY
When does an electric short circuit and overloading occur?
EASY

Write the conventional symbol of the following component used in electric circuit diagram-

An electric cell

EASY
Which wire in a power circuit is connected to the metallic body of the appliance?
MEDIUM
According to Joule’s law of heating, mention the factors on which heat produced in a resistor depends. According to this law write the formula used to calculate the heat produced.
EASY

The diagram below shows a dual control switch circuit connected to a bulb. Out of A & B which one is the live wire and which one is the neutral wire? 

Question Image

EASY

Write the conventional symbol of the following component used in electric circuit diagram-

A wire joint

EASY
Write the circuit symbol of p-n-p transistor.
EASY

Correct the statements by modifying the underlined words appropriately if it is wrong.

Heating coils are made up of materials having high resistivity and low melting point.

EASY

Write the conventional symbol of the following component used in electric circuit diagram-

Electric bulb

EASY
What characteristics should a fuse wire have?
EASY
Identify the following wires used in a household circuit :
(i) The wire is also called as the phase wire.
(ii) The wire is connected to the top terminal of a three pin socket.
EASY

In the given circuit diagram, identify the objects marked as 1, 2, 3.

Question Image

EASY
Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?
MEDIUM
Why is fuse wire always placed in a live circuit?
EASY
What are the functions of an earth wire? Why is it necessary to earth metallic appliances?
EASY

When 2 A current is passing through a conductor in 10 seconds, 80 J heat is produced then find the resistance of conductor.

EASY
Why are the heating elements of electric toasters and electric irons made of an alloy rather than a pure metal?