The resistance of a copper wire is 20 Omega at 0^@C . Find the resistance at 60^@C if the temperature coefficient of resistance of material is 0.004//^@C .

The resistance of a potentiometer wire is 10 Omega and its length is 10 meter. A resistance box and 2 V accumulator are placed in series with it. What should be the value of resistance in the box if it is desired to have potential drop of 1muV /mm?

The resistance of a potentiometer wire is 8 Omega and its length is 8 m. A resistance box and a 2 V battery are connected in series with it. What should be the resistance in the box, if it is desired to have a potential drop of 1 mu V/mm ?

The resistance of a potentiometer wire is 8 Omega and its length is 8 m. A resistance box and a 2V battery are connected in series with it. What should be the resistance in the box, if it is desired to have a potential drop of 1muV//mm ?.

The resistance of a wire of length 31.4 m and diameter 1 mm is 20 Omega . Find the resistivity of the material of the wire.

The e.m.f. of a cell is balanced by fall of potential along 281 cm of potentiometer wire. If a resistance of 8 Omega is connected across the cell , the balancing length is found to be 151 cm. Calculate internal resistance of a cell.

The potential gradient along the length of uniform wire is 10" Vm"^(-1) . The length of the wire is 1 m. What is the potential difference across two points on the wire separated by 25 cm?

The resistance of a wire of length 15.7 m and radius 0.5 mm is 10 Omega . Find the resistivity of the material of the wire.

Choose correct alternative. A wire of length 20 cm has resistance 5 Omega . It is stretched up to 60 cm, its resistance will be

A wire of resistance 100 Omega is uniformly stretched until its length increases by 5% . What will be its resistance after stretching? Assume that the volume of the wire remains the same when it is stretched.