Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: TS EAMCET - 5 August 2021 Shift 1

Find the potential difference between $a$ and $b$, as shown in the below circuit.

Current flowing through a circuit is shown in the figure then the resistance of the circuit is

A tapered bar of length $L$ and end diameters $D_1$ and $D_2$ is made of a material of electrical resistivity $\rho$. The electrical resistance of the bar is

A cylindrical metallic wire is stretched to increase its length. If the resistance of the wire is increased by $4\%$ then the percentage increase in its length is

The length of germanium rod is $0.928 \mathrm{cm}$ and its area of cross-section is $1{ \mathrm{mm}}^2.$ If for germanium $n_i=2.5\times {10}^{19}{ \mathrm{m}}^{-3}, {\mu }_{\mathrm{h}}=0.15{ \mathrm{m}}^2{ \mathrm{V}}^{-1}{ \mathrm{s}}^{-1}, {\mu }_{\mathrm{e}}=0.35{ \mathrm{m}}^2{ \mathrm{V}}^{-1}{ \mathrm{s}}^{-1}$ then resistivity is

Consider the following two circuits

$\left[A\right] :$ $20$ bulbs are connected in series to a power supply line

$\left[B\right] :$ $20$ bulbs identical to $\left[A\right]$ are connected in a parallel circuit to an identical power supply line

Identify which of the following is not true

In a meter bridge experiment, the balance point from left is $37.5 \mathrm{cm}.$ The ratio of the right gap resistance to the left gap resistance is

A galvanometer coil has a resistance of $10\mathrm{\Omega }$ and the meter shows full scale deflection for a current of $2 \mathrm{mA}.$ What resistance needs to be connected to convert the meter into a voltmeter of range $0$ to $18 \mathrm{V}?$