A resistance is made by connecting two wires (series) of same material of radii 2 mm and 5 mm and length 8cm and 5 cm. A potential difference of 22V is applied to them. What is the potential difference on the longer wire?

Potential difference between two given points 5, cm apart, is 20V. What is the value of electric field?

A cell of e.m.f. 2 V and negligible internal resistance is connected to a potentiometer wire of resistance 10 Omega and length 4 m. The potential difference per unit length (potential gradient ) of the wire is

Two parallel plates are 5 cm apart and a potential difference of 6- V is set up across them. Find the electric field intensily between the two plates.

Two wire A & B are of the same metal and are of same length have area of cross section in the ratio of 2:1 If the same potential difference is applied across each wire. What will be the ratio of the current flowing through the wires A & B ?

Two cells of e.m.f. of 1.6 V and 2.4 V have internal resistance 2 and 4 respectively. The two resistance wires positive poles are connected to resistance of 6 and negative poles connected to 8 ohm. If another wire of 10 is connected between the mid-points of these wires, what is the potential difference across it.

Two resistances of 400 ohm and 800 ohm are connected in series with 6 volt battery of negligible internal resistance. A voltmeter of resistance 10,000ohm is used to measure the potential difference across 400 ohm. The error in the measurement of potential difference in volt approximately .

A coil of negligible resistance and inductance 0.02 henry is connected in series with a wire of zero inductance and resistance 12 ohm. An alternaitng e.m.f of 130 volt and 40 Hz is applied. Calculate the current, potential difference across the resistance and the angle of lag.

A 10 meter long wire of uniform cross section of 20 Omega resistance is used as a potentiometer wire. This wire is connected in series with a battery of 5V along with an external resistance of 480 Omega if an unknown emf epsilon is balanced at 600 cm of this wire , calculate the potential gradient of the potentiometer wire.