Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Exercise

Find the emf of the battery shown in figure.

Calculate the net emf across A and B shown in figure below :

The car-battery is of $12 \mathrm{volt}$. $8$ simple cells connected in series can give $12 \mathrm{volt}$. But such cells are not used in starting a car, why?

Find the value of resistance $\mathrm{X}$ in the given circuit so that junctions $\mathrm{M}$ and $\mathrm{N}$ are at the same potential.

The adjoining circuit diagram represents balanced Wheatstone’s bridge, calculate $\mathrm{R}$.

Is internal resistance a drawback of the cell? Does it remain constant?

Does emf of a cell represent a force or potential energy or work done per unit charge? When will it be equal to the PD across the terminals of the cell?

Is the direction of emf in a cell dependent on the direction of current within the cell?