Current Electri...

Imagine that you have a 100$$\Omega$$ resistor. You want to add a resistor in series with this 100$$\Omega$$ resistor in order to limit the current to 0.5A when $$110 $$ Volts is placed across two resistors in series. How much resistance should you use?

The attached circuit diagram shows connection of 3 resistors. All are connected in parallel . Thus what is the equivalent resistance.

What is the highest equivalent resistance that can be secured by combinations of four coils of resistance $$4\ \Omega$$, $$8\ \Omega$$, $$12\ \Omega$$, $$24\ \Omega$$?

The equivalent resistance of parallel combination is:

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

If n resistance (each R) are connected in parallel then the resultant will be

Two cells A and B of emf 2V and 1.5 V respectively, are connected as shown in figure through an external resistance $$10\Omega$$. the internal resistance of each cell is $$5\Omega$$. The potential difference $$E_A$$ and $$E_B$$ across the terminals of the cells A and B respectively are:

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

Potentiometer measures the potential difference more accurately than a voltmeter because :

A $$2V$$ battery, a$$990 \Omega$$ resistor and a potentiometer of $$2m$$ length, all are connected in series of the resistance of potentiometer wire is $$10\Omega$$, then the potential gradient of the potentiometer wire is