Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Nagaland Board-2018

A silver wire has a resistance of $2.7\Omega$at $100°\mathrm{C}$. Determine the temperature coefficient of resistivity of silver.

The storage battery of a car has an emf of $12\mathrm{V}$. If the internal resistance of the battery is $0.4\Omega$, what is the maximum current that can be drawn from the battery?

Derive the expression for equivalent emf (${\mathrm{E}}_{\mathrm{eq}}$) for the cells in series combination.

In a meter bridge, the balance point is found to be at $39.5\mathrm{cm}$ from $\mathrm{A}$. When the resistor $\mathrm{Y}$is of $12.5 \Omega$.

Determine the resistance of $\mathrm{X}$.

In a meter bridge, the balance point is found to be at $39.5\mathrm{cm}$ from $\mathrm{A}$. When the resistor $\mathrm{Y}$is of $12.5 \Omega$.

Determine balance point of the bridge above, if $\mathrm{X}$and $\mathrm{Y}$are interchanged.

In a meter bridge, the balance point is found to be at $39.5\mathrm{cm}$ from $\mathrm{A}$. When the resistor $\mathrm{Y}$is of $12.5 \Omega$.

What happens if the galvanometer and cell are interchanged at the balance point of the bridge?

Three resistors $1\Omega , 2\Omega , 3\Omega$ are combined in series.

$\left(\mathrm{i}\right)$ What is the total resistance of the combination?

Three resistors $1\Omega , 2\Omega , 3\Omega$ are combined in series.

$\left(\mathrm{ii}\right)$  If the combination is connected to a battery of emf $12\mathrm{V}$, and negligible internal resistance, obtain the potential drop across the resistor.