Question

electricity example 12.2 10th class​

Answer 1

Answer:

w=24 j

Explanation:

Answer=

The amount of charge =Q

potential difference = V

the amount of work =w

given ,V=12 and Q=2

work done =potential difference ×charge

w=12v×2c

w=24 j answer

Answer 2

Explanation:

Observation:

Current through different materials are different.

Explanation:

An object may offer varying degrees of electrical conductance. It depends on their elemental and molecular properties. Some elements like silver, copper, aluminium have high conductivity while others like carbon, rubber do not conduct electricity. We call this property as resistance.

Here we use three different material namely nichrome wire, a torch bulb and a 10W bulb. Nichrome is an alloy of nickel and chromium. It offers high resistance to electrical conductivity. Filament bulb uses tungsten. Tungsten is a high resistance metal which glows at high temperature.

As per Ohm’s law,

V=IR

Since V is constant here, Current ‘I’ becomes inversely proportional to the resistance of the material.

Inference/conclusion:

This experiment demonstrates different material have different electrical conductance or resistance.

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