Electricity Tes...

The process of acquiring temporary electrification under the influence of a charged body is called

A current of 4.8 A is flowing through a conductor. The number of electrons passing per second through the conductor is

Ohm's law gives a relation between

When the diameter of a wire is doubled, its resistance becomes

The resistance of a wire of uniform diameter D and length L is R. The resistance of another wire of the same material, but diameter 2D and length 4L will be

^{_{Two resistances are joined in parallel, whose resultant is (6/5). One of the resistance wires is broken and the effective resistance is 2. The resistance of the broken wire is}}

The effective resistance of the network between points A and B is

A battery and resistances are connected in a circuit as follows. The current flowing through the ammeter A is

Three wires of resistances 18 ohms, 15 ohms and 10 ohms are connected in parallel. The current in the 18 ohm wire is 0.75 A. What is the current in the 15 ohm wire?

A geyser of 2.5 kW is connected to a battery of 220 volts. An iron of 1.5 kW is also connected to the battery. To prevent any failure of fuse, the fuse wire must have a current rating of

The north pole of a magnet is brought near a stationary positively charged conductor. The north pole exerts a force, which will

A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then

A transformer is used

A milliammeter of range 10 mA gives full-scale deflection for a current of 100 mA when a shunt of 0.1 Ω is connected in parallel to it. The coil of the milliammeter has a resistance of

The direction of magnetic field at a point due to an infinitely long wire carrying current is

Charge Q is divided into two parts, which are then kept some distance apart. The force between them will be the highest, if the two parts are

Power is transmitted from a power house on high voltage AC because

DC can be converted into AC with the help of

Molten sodium chloride conducts electricity due to the presence of

A small piece of unmagnetised substance gets repelled when it is brought near a powerful magnet. The substance can be