Electricity Tes...

An electric iron is connected to a $$200 V$$ mains supply and draws a current of $$4.0 A$$ What is the power rating of the iron ?

A potential difference of 20V is needed to make a current of 0.05A  flow through a resistor. What potential difference is needed to make a current of 300 mA flow through the same resistor?

An $$8 \Omega$$ resistance wire is doubled up by folding. What is the new resistance of the wire?

The value of equivalent resistance between the points $$A\;and\;B$$ in the given circuit, will be

The minimum resistance that can be obtained by connecting 5 resistance of $$\displaystyle \frac{1}{4} \Omega$$  each is 

Two electric bulbs whose resistance are in the ratio of $$1 : 2$$ are connected in parallel to a constant voltage source. The ratio of the power dissipated in them will be:

A wire of resistance 12 ohm is bent in the form of a circular ring. The effective resistance between the two points on any diameter of the circle is:

The temperature of a metal wire rises when an electric current is passed through it because:

What is the minimum resistance that one can obtain by connecting all the five resistances each of $$0.5\Omega$$?

An electric bulb is rated 220 volt and 100 watt, Power consumed by it when operated on 110 volt is :