Electricity Tes...

Two metallic wires of $$\displaystyle 6\Omega $$ and $$\displaystyle 3\Omega $$ are in connection. What will be the mode of connection so that to get effective resistance of $$\displaystyle 2\Omega $$ ?

Three resistors each having the same resistance are connected in parallel. Their equivalent resistance is $$\displaystyle 5\ \Omega $$. If they are connected in series, their equivalent resistance is.

Number of KWh in 1 Joule.

In the circuit, $$\displaystyle 5\Omega $$ resistor develops 45J/s due to current flowing through it. The power developed per second across $$\displaystyle 12\Omega $$ resistor is:

An electricity bulb of 100 watt is connected to  supply of electricity of 220V. Resistance of filament is

When two resistances $$\displaystyle { R }_{ 1 }$$ and $$\displaystyle { R }_{ 2 }$$ are connected in series, they consume 12W power. When they are connected in parallel, they consume 50W power. What is the ratio of the powers of $$\displaystyle { R }_{ 1 }$$ and $$\displaystyle { R }_{ 2 }$$

How much current is drawn by the motor of 1 H.P. from 220 volt supply.

A bulb of $$22\ \Omega $$ is producing light when connected to a $$220\ V$$ supply. What is the electric power of the bulb?

An electric bulb of resistance of $$1000   \Omega$$ draws a current of $$0.05   A$$. Calculate the power of the bulb :

An electric bulb of resistance $$20   \Omega$$ draws a current of $$0.04   A$$. Calculate the potential difference at the ends.