Give Reason
Conducting wires are made of metals.

Give reason Petrol storage tanks are made of aluminium.

The lengths of three conducting wires are in the ratio 1: 2 : 3. All the wires are of same metal and their radii are also equal. If we join them in parallel across a battery, what will be the ratio of current in them?

.Give reason for the following: (a) School bells are made up of metals. (b) Electric wires are made up of copper.

Assertion : Electric field outside the conducting wire which carreis a constant is zero. Reason : Net charge on conducting wire is zero.

Two spheres of same metal have radii a and b . They have been connected to a conducting wire. Find the ratio of the electric field intensity upon them.

Assertion: Metals are generally good conductors of electricity Reason: Electrical conductivity of metals is due to Schottky type of defects

In the circuit shown if a conducting wire is connected between points A and B, the current in this wire will :-

In the circuit shown if a conducting wire is connected between points A and B, the current in this wire will :-

In the stages involved in the extraction of metals in general - give reasons for following Reduction of metallic oxides to metal in the extraction of metals from the ores - is based on the position of the metal in the activity series.

Wire bound resistors are made by