AIIMS UG 2013 Mock Test

The internal resistance of a $2.1\text{V}$ cell which gives a current of $0.2\text{A}$ through a resistance of $10\Omega$ is:

The resistances of the four arms $P,Q,R,S$ in a Wheatstone bridge are $10\Omega ,30\Omega ,30\Omega ,90\Omega$ respectively. The e.m.f. is $7\text{V}$ and internal resistance is $5\Omega$. What is the current drawn from the cell?

A proton released from rest starts with acceleration $a_0$ towards west. When projected towards north with speed $v_0$, it moves with initial acceleration $3a_0$ towards west. The electric and magnetic fields in the room are:

A current loop in a magnetic field:

A bar magnet of length $l$ and magnetic dipole moment $M$ is bent in the form of an arc subtending $60^{\circ }$ at the center. The new magnetic dipole moment will be: