Electricity Tes...

A bulb rated at (100W-200V) is used on a 100 V line. The current in the bulb is

The rate of change of magnetic field inside a solenoid is constant($$\alpha$$)
. Then the induced electric field inside the solenoid at a distance 'a' from its axis is

The reading of the ammeter is:

The wires of same dimension but different resistivities $$ \rho_1$$ and $$\rho_2 $$ are connected in parallel. The equivalent resistivity of the combination is

Meeta connected 4 resistors in parallel. Each has a resistance  of $$ 2 \Omega   $$.  Find the effective resistance .

A copper wire of resistance $$R$$ is cut into ten parts of equal length. Two-piece are joined in series and then five such combinations are joined in parallel. The new combination will have resistance.

Most of the times we connect remote speakers to play music in another room along with the built-in speakers. These speakers are connected in parallel with the music system.
At the instant represented in the picture, the voltage across the speakers is $$6.00 V.$$ The resistance of the main speaker is $$ 8 \space \Omega$$ and the remote speaker has resistance $$ 4 \space \Omega$$
    The equivalent resistance of the speakers is

The effective resistance between $$A$$ and $$B$$ is

The equivalent resistance of the circuit across points A and B is equal to      

A metal wire of resistance $$3\Omega$$ is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle $$60^o$$ at the centre, the equivalent resistance between these two points will be?