Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: AP EAPCET 2021 (19-Aug Forenoon)

A cell of emf $1.8$ volts gives a current of $17 \mathrm{A}$ when directly connected to an ammeter of resistance $0.06 \mathrm{\Omega }$. Internal resistance of the cell is

In the given circuit, the electric currents through $15 \mathrm{\Omega }$ and $6 \mathrm{\Omega }$ respectively are

In the given circuit, the current through $2 \mathrm{\Omega }$ resistor is

Five current carrying conductors meet at a point $\mathrm{P}$. What is the magnitude and direction of the current in the fifth conductor?

The length of germanium rod is $0.925 \mathrm{cm}$ and its area of cross section is $1{ \mathrm{mm}}^2$. If for germaniun $n_i=$ $2.5\times {10}^{19}{ \mathrm{m}}^{-3},{\mu }_h=0.19{ \mathrm{m}}^2/v-s,{\mu }_e=0.39{ \mathrm{m}}^2/v-s$, then the resistance of the rod is

The conductivity of a conductor decreases with temperature because, on heating:

In a potentiometer, a wire of length $10 \mathrm{m}$ having resistance $50 \mathrm{\Omega }$ is used. A battery of $5 \mathrm{V}$ and a resistor of $450 \mathrm{\Omega }$ are connected in series to the wire. If an unknown battery of emf $\text{'}E\text{'}$ balances the potentiometer at $450 \mathrm{cm}$, then the value of $E$ is

In a potentiometer of $10$ wires, the balance point is obtained on the $6^{\text{th }}$ wire. To shift the balance point to $8^{\text{th }}$ wire, we should