AIEEE 2004 (Physics) Mock Test

Time taken by a $836\text{W}$ heater to heat one litre of water from $10^{\circ }\text{C}$ to $40^{\circ }\text{C}$ is:

The thermo emf of a thermocouple varies with the temperature $\theta$ of the hot junction as $E=a\theta +b{\theta }^2$ in volts where the ratio $a/b$ is $700^{\circ }\text{C}$. If the cold junction is kept at $0^{\circ }\text{C}$, then the neutral temperature is:

The electrochemical equivalent of a metal is $3.3\times 10^{-7}\text{kg}$ per coulomb. The mass of the metal liberated at the cathode when a $3\text{A}$ current is passed for $2\text{seconds}$ will be:

A current $I$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is:

A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $n$ turns. The magnetic field at the centre of the coil will be: