AIPMT 2012 Preliminary Mock Test

An $\alpha$ -particle moves in a circular path of radius $0.83\text{cm}$ in the presence of a magnetic field of $0.25{\text{Wb/m}}^2$. The de Broglie wavelength associated with the particle will be:

The figure shows a logic circuit with two inputs $A$ and $B$ and the output $C$. The voltage wave forms across $A,B$ and $C$ are as given. The logic circuit gate is:

A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It:

A spherical planet has a mass $M_p$ and diameter $D_p$. A particle of mass $m$ falling freely near the surface of this planet will experience an acceleration due to gravity, equal to:

A $200\text{W}$ sodium street lamp emits yellow light of wavelength $0.6\mu \text{m}$. Assuming it to be $25\%$ efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is: