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

The value of current $l$ in the circuit will be

A galvanometer has resistance of $400 \mathrm{\Omega }$ and deflects full scale for current of $0.2 \mathrm{mA}$ through it. The shunt resistance required to convert it into $3 \mathrm{A}$ ammeter is

A galvanometer having a coil resistance of $60 \mathrm{\Omega }$ shows full scale deflection when a current of $1.0 \mathrm{A}$ passes through it. It can be converted into an ammeter to read currents upto $5.0 \mathrm{A}$ by

In the network of five resistors, what should be the value of $y$ such that effective resistances between points $a$ and $b$ does not change.

Resistance across $AB$ as shown in figure is

In the given circuit, no current is passing through the galvanometer. If the cross-sectional diameter of the wire $AB$ is doubled, then for null point of galvanometer, the value of $AC$ would be:

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.

The value of the unknown resistor $R$ is:

In a meter bridge experiment, the one meter long wire used must possess