Embibe Experts Solutions for Chapter: Magnetic Effect of Electric Current, Exercise 1: Exercise 1

A straight current carrying conductor is placed in such a way that the current in the conductor flows in the direction out of the plane of the paper. The conductor is placed between two poles of two magnets, as shown



The conductor will experience a force in the direction towards

$AB$ and $CD$ are fixed conducting smooth rails placed in a vertical plane and joined by a constant current source at its upper end. $PQ$ is a conducting rod which is free to slide on the rails. A horizontal uniform magnetic field exists in space as shown. If the rod $PQ$ is released from rest then,

The current sensitivity of moving coil galvanometer of resistance $100 \mathrm{\Omega }$ is $1 \mathrm{div}/\mathrm{mA}.$ Its voltage sensitivity is

An ammeter and a milliammeter are converted from identical galvanometers. Which one has smaller resistance?

Sensitivity of a moving coil galvanometer can be increased by:

In an attempt to increases the current sensitivity of a moving coil galvanometer, it is found that its resistance becomes double while the current sensitivity increases by $10\%$. The voltage sensitivity of the galvanometer changes by

If the number of turns and radius of cross section of the coil of a tangent galvanometer are doubled, then the reduction factor $K$ will become

A short bar magnet passes at a steady speed right through a long solenoid. A galvanometer is connected across the solenoid. Which graph best represents the variation of the galvanometer deflection $\theta$ with time $t ?$