Question

The resistance of a conductor is inversely proportional to its _______.

(a) Volt (b) Length (c) Area (d) None ofthe above

Why battery is used in the circuit?

(a) Measure Current (b) Maintain a potential difference (c) Oppose the current (d) Measure potential​

Answer 1

Explanation:

• Resistance depends on an object's size, shape, and material. In Figure 3 below, the cylinder's resistance is directly proportional to its length l. The longer the cylinder, the higher the resistance. Additionally, the resistance is inversely proportional to the cross sectional area A.
• The key functions of a battery and bulb in a circuit are explained. A battery is a source of energy which provides a push - a voltage - of energy to get the current flowing in a circuit. ... When the energy in the battery is used up there is no current and the bulb does not light up.

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