The resistance of an Carbon wire is `10Omega` current of 30mA is flowing in it at `20^(@)C` .If p.d across its ends constant then its temperature is increased to `120^(@)C` then the current flowing in the wire will be in `mA` `(alpha_(c)=5times10^(-3)/^(@C)`

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 current of 200mA flows through a 4k Omega resistor. What is the p.d. across the resistor?

Resistance of tungsten wire at 150^(@)C is 133 Omega . Its resistance temperature coefficient is 0.0045//^(@)C . The resistance of this wire at 500^(@)C will be

In the below circuit , AB is a wire of length 100 cm with 5Omega resistance . If there is no deflection in the galvanometer , the current flowing in the wire AB is

The resistance of a thin silver wire is 1.0 Omega at 20^@C . The wire is placed in liquid bath and its resistance rises to 1.2 Omega . What is the temperature of the bath ? (Here alpha=10^-2//^@C )

carbon and an aluminimum wire are connected in series.If the combination has resistance of 30Omega at 0^(@)C .The ratio of resistance of aluminimum to carbon at 0^(@)C is x then x= (Here the resistance of combination does not change with temperature) Take alpha_(c)=-0.5times10^(-3) /^(@)c;alpha_(A)=4times10^(-3) /^(@)C

The resistance of a wire at 20^(@)C is 20Omega and at 500^(@)C is 60Omega . At which temperature its resistance will be 25Omega ?