AIIMS 2018

The diode used at a
constant potential drop
of 0.5 V at all currents
and maximum power
rating of 100 mW. What
resistance must be
connected in series diode, so that current in
circuit is maximum?

Assertion Thickness of depletion layer is
fixed in all semiconductor devices.
Reason No free charge carriers are available
in depletion layer.

If the formula, \(X=3 Y Z^2, X\) and \(Z\) have dimensions of capacitance and magnetic induction. The dimensions of \(Y\) in MKSQ system are

An unpolarised beam of intensity \(2 a^2\) passes through a thin polaroid. Assuming zero absorption in the polaroid, the intensity of emergent plane polarised light is

Red light of wavelength 5400 \(\mathop A\limits^o\) from a
distant source falls on a slit 0.80 mm wide.
Calculate the distance between first two dark
bands on each side of central bright band in
the diffraction pattern observed on a screen...

Assertion : If a glass slab is placed in front of
one of the slits, then fringe with will
decrease.
Reason : Glass slab will produce an
additional path difference.

A steel rod 100 cm long is damped at into
middle. The fundamental frequency of
longitudinal vibrations of the rod are given
to be 2.53 kHz. What is the speed of sound
in sound is steel?

A pipe of length 85 cm is closed from one
end. Find the number of possible natural
oscillations of air column in the pipe whose
frequencies lie below 1250 Hz. The velocity
of sound in air is 340 m/s.

Assertion To hear different beats difference
of the frequencies of two sources should be
less than 10.
Reason More the number of beats more in
the confusion.

The figure shows a mass \(m\) on a frictionless surface. It is connected to rigid wall by the mean of a massless spring of its constant \(k\). Initially, the spring is at its natural position. If a force of constant magnitude starts acting ...