Home
Class 12
PHYSICS
The resistance of a wire of iron is 10 o...

The resistance of a wire of iron is `10 ohm` and temperature coefficient of resistivity is `5 xx 10^-3//.^@C`, At `20^@C` it carries `30 mA` of current. Keeping constant potential difference between its ends. The temperature of the wire is raised to `120^@C`. The current in `mA` that flows in the wire now is.

Promotional Banner

Similar Questions

Explore conceptually related problems

A current of 150 mA flows through a wire when the potential difference between its ends is 300 volt. Calculate the resistance of the wire,

A silver wire has a temperature coefficient of resistivity 4 xx 10^(-3) .^@C^(-1) and its resistance at 20^@ C is 10^@ Neglecting any change in dimensions due to the change in temperature , its resistance at 40^@C is

The resistance of iron wire is 10Omega and alpha=5xx(10^(-3))/( .^(@)C) . If a current of 30A is flowing in it at 20^(@)C keeping the potential difference across its length constant, if the temperature is incresed to 120^(@)C what is the current flowing through that wire?

A piece of platinum wire has resistance of 2.5 Omega 0^@C . If its temperature coefficient of resistance is 4 xx 10^-3//^@C . Find the resistance of the wire at 80^@C .

The temperature coefficient of resistance of a wire is 0.00125 per ^@C . At 300K, its resistance is 1 ohm. This resistance of the wire will be 2 ohm at.

Find the potential difference required to flow a current of 200 mA in a wire of resistance 20 Omega .

The temperature coefficient of resistance of a wire is 0.00125^@ C^(-1) w.r.t temperature at 300 K at which the resistance of the wire is one ohm. Find the temperature at which the resistance of the wire will be 2 ohm.

The temperature coefficient of resistance of platinum is alpha =3.92 xx 10^(-1) K^(-1) at 10^(@) C. Find the temperature at which the increase in the resistance of platinum wire is 10% of its value at 10^(@) C.