Electricity Tes...

If n cells each of emf $$\varepsilon$$ and internal resistance r are connected in parallel, then the total emf and internal resistances will be:

In the series combination of n cells each cell having emf $$\varepsilon$$ and internal resistance r. If three cells are wrongly connected, then total emf and internal resistance of this combination will be.

Refer to teh circuit shown. What will be the total power dissipation in the circuit if $$P$$ is the power dissipated in $${R}_{1}$$? It is given that $${R}_{2}=4{R}_{1}$$ and $${R}_{3}=12{R}_{1}$$

 The conventional electric current flows from

If two bulbs of $$25W$$ and $$100W$$ rated at $$200$$ volts are connected in series across a $$440$$ volts supply, then

The resistance of the series combination of two resistance is $$S$$. When they are joined in parallel through total resistance is $$P$$. If $$S=nP$$, then the minimum possible value of $$n$$ is?

Find the equivalent resistance between points A and B in the given circuit

In the network shown in the figure, the equivalent resistance between A and C is

A wire of resistance 'R' is cut into 'n' equal parts. These parts are then connected in parallel with each other. The equivalent resistance of the combination is:

Three resistance $$R, 2R$$ and $$3R$$ are connected in parrallel to a battery ,then