AIPMT 2002

For a cell terminal potential difference is 2.2V when circuit is open and reduce to 1.8 V when cell is connected to a resistance of R = 5 \(\Omega\). Determine internal resistance of cell (r)

If particles are moving with same velocity, then which has maximum de Broglie wavelength?

Which of the following is not the property of cathode rays ?

When ultraviolet rays incident on metal plate then photoelectric effect does not occur, it occurs by incidence of

The value of Planck's constant is

The velocity of electromagnetic wave is parallel to

What is the cause of Green house effect ?

Some charge is being given to a conductor. Then its potential is

Identical charges (\(-\)q) are placed at each corners of cube of side b then electrostatic potential energy of charge (+q) which is placed at centre of cube will be

Diameter of human eye lens is 2 mm. What will be the minimum distance between two points to resolve them, which are situated at a distance of 50 meter from eye. The wavelength of light is 5000 \(\mathop A\limits^ \circ\)

A bulb is located on a wall. Its image is to be obtained on a parallel wall with the help of convex lens. The lens is placed at a distance d ahead of second wall, then required focal length will be

For the given incident ray as shown in figure, the condition of total internal refraction of this ray the required refractive index of prism will be

The efficiency of Carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency raised to 60%, then the required temperature of sink will be

An object of mass 3 kg is at rest. Now a force of \(\overrightarrow F\) = 6t2 \(\widehat i\) + 4t \(\widehat j\) is applied on the object then velocity of object at t = 3 sec. is

A lift of mass 1000 kg which is moving with acceleration of 1 m/s2 in upward direction, then the tension developed in string which is connected to lift is

A block of mass 10 kg placed on rough horizontal surface having coefficient of friction m = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be

Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is T1. Now the polarity of one of the magnet is reversed then t...

A particle A is dropped from a height and another particle B is projected in horizontal direction with speed of 5/sec from the same height then correct statement is

A charge q moves in a region where electric field and magnetic field both exist, then force on it is

The magnetic field of given length of wire for single turn coil at its centre is B then its value for two turns coil for the same wire is

To convert a galvanometer into a voltmeter one should connect a

When an oscillator completes 100 oscillations its amplitude reduced to \({1 \over 3}\) of initial value. What will be its amplitude, when it complettes 200 oscillations ?

Displacement between maximum potential energy position and maximum kinetic energy position for a particle executing simple harmonic motion is

A mass is suspended separately by two different springs in (successive order then time periods is t1 and t2 respectively, If it is connected by both spring as shown in figure then time period is t0 , the correct relation is

For a black body at temperature 727oC, its radiating power is 60 watt and temperature of surrounding is 227oC. If temperature of black body is changed to 1227oC then its radiating power will be

Consider two rods of same length and different specific heats (S1, S2), conductivities (K1, K2) and area of cross-sections (A1, A2) and both having temperatures T1 and T2 at their ends. If rate of loss of heat due to conduction is equal, th...

Which of the following is best close to an ideal black body?

The Wien's displacement law express relation between

Unit of Stefan's constant is

A circular disc is to be made by using iron and aluminium so that it acquired maximum moment of inertia about geometrical axis. It is possible with

A solid sphere of radius R is placed on smooth horizontal surface. A horizontal force F is applied at height h from the lowest point. For the maximum acceleration of centre of mass, which is correct ?

A point P consider at contact point of a wheel on ground which rolls on ground without slipping then value of displacement of point P when wheel completes half of rotation (if radius of wheel is 1 m)

A disc is rotating with angular speed \(\omega\). If a child sits on it, what is conserved

Number of atom per unit cell in B.C.C.

The given truth table is for which logic gate
              \(\matrix{ A & B & Y \cr 1 & 1 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 0 & 0 & 1 \cr }\)

For a transistor \({{{I_C}} \over {{I_E}}}\) = 0.96, then current gain for common emitter is

In a p-n junction

For the given circuit of p-n junction diode which is correct

A whistle revolves in a circle with angular speed \(\omega\) = 20 rad/s using a string of length 50 cm. If the frequency of sound from the whistle is 385 Hz, then what is the minimum frequency heard by an observer which is far away from th...

A wave travelling in positive X-direction with a \(=\) 0.2 ms\(-\)2, velocity = 360 ms\(-\)1 and \(\lambda\) \(=\) 60 m, then correct expression for the wave is