Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: AP EAPCET Medical 2018 (22-Apr Shift-1)

The current flowing through a wire depends on time as $I=3t^2+2t+5.$ The charge flowing through the cross section of the wire in time from $t=0$ to $t=2 \mathrm{s}$ is

The unit of current element is $\underline{ }$
 

Identify the correct variation of drift velocity $\left(v_d\right)$ with electric field strength $\left(E\right):$

Assertion (A): As soon as a source of emf is connected across a conductor, a current immediately starts flowing through it.
Reason (R): Drift speed of the electron is so large that electron travel from one end of the conductor to the other end almost instantaneously.

An electric cable has just one copper wire of radius $8 \mathrm{mm}$ and resistance $10 \mathrm{\Omega }$. This single copper wire cable is replaced by $4$ different well insulated copper wires each of radius $6 \mathrm{mm},$ then total resistance of the cable is

In the circuit shown below, the current $I_1$ is __________

If the balancing length in a potentiometer experiment changes by $10 \%$ when the cell of unknown emf is shunted by $6 \mathrm{\Omega }$ resistance, then the internal resistance of the cell in $\mathrm{\Omega }$ is

Two galvanometers $A$ and $B$ require $3 \mathrm{m}A$ and $5 \mathrm{m}A$ respectively to produce same deflection of  $\text{'}{I}_0\text{'}$ divisions. Then.