Electricity Tes...

An electric lamp is marked $60 \ W$, $230 \ V$. The cost of $1 \ kilowatt-hour$ of power is $Rs \ 1.25$. The cost of using this lamp for $8 \ hours$ is

The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated $220 \ V$ and $100 \ W$ is connected to  $(220\times 0.8) \ V$ source, then the power would be : 

An electric bulb marked 40 W and 200 V, is used in a circuit of supply voltage 100 v, Now its power is

The current flowing through a lamp marked as $50 \ W$ and $250 \ V$ is

The electric passing through a metallic wire produces heat because of

A heater coil is cut into two equal parts and only one part is now use in the heater. The heat generated will now be

The conductors of resistance $1 \Omega, 2 \Omega$ and $3\Omega$ are in series in a circuit. What is the equivalent resistance in the circuit ?

If a $5 \,V$ battery is provoding $2 \,A$ current in a conductor then what is the resistance of conductor ?

Kilowatt hour is unit of

What happens to the current in each resistor when resistors of different values in parallel combination are connected to a source of electricity?