Calculate the specific resistance of the material of a wire having a resistance of `4.4 Omega`, length 1.1 m and radius 0.2 mm.

Two resistances 2 ohm and 3 ohm are connected across the two gaps of the metre bridge as shown in the figure .Calculate the current through the cell when the bridge is balanced and the specific resistance of the material of the metre bridge wire. Given the resistance of the bridge wire is 1.49 ohm and its diameter is 0.12 cm.

Determine the resistance of a copper wire having a length of 1 km and diameter of 0.5 mm

Choose correct alternative. The following wires are made of same material. The wire whose resistance is maximum will be A. 2 mm radius and 80 m length B. 2 mm radius and 40 m length C. 1 mm radius and 40 m length D. 1mm radius and 80 m length

Choose correct alternative. The number of equal resistance connected in series have effective resistance of 32 Omega . When the same resistances are connected in parallel then effective resistance is 2 Omega . The number of resistances are A. 4 B. 8 C. 5 D. 10

A battery having e.m.f. 5V and internal resistance 0.5 is connected with a resistance of 4.5 Omega , then the voltage at the terminals of the battery is

In given figure, the potentiometer wire AB has a resistance of 5Omega and length 10 m. The balancing length AM for the e.m.f. of 0.4 V is

Calculate the thermal resistance of 1 square metre of window glass pane that is 0.5 cm thick (k=0.6frac(W)(m^@C))

Choose correct alternative. The internal resistance of a cell of emf 2V is 0.1 Omega . It is connected to a resistance of 0. 9 Omega . The voltage across the cell will be.

A cell of e.m.f. 2 volt and negligible internal resistance is connected to potentiometer wire of length 4 m and resistance 25 Omega , to form a closed circuit. Find the potential gradient along the wire .