Recent questions and answers in 2002

A deuteron is bombarded on $_{8}O^{16}$ nucleus then $\alpha$-particle is emitted then product nucleus is -

answered Nov 14, 2019 by meena.clay6

2 answers

A sample of radioactive element containing $4 \times10^{16}$ active nuclei. Half life of element is 10 days, then number of decayed nuclei after 30 days : -

answered Nov 14, 2019 by meena.clay6

2 answers

The velocity of electromagnetic wave is parallel to : -

answered Nov 14, 2019 by meena.clay6

1 answer

Identical charges (–q) are placed at each corner of a cube of side 'b' then electrical potential energy of charge (+q) which is placed at centre of cube will be

answered Nov 14, 2019 by meena.clay6

1 answer

To convert a galvanometer into a voltmeter one should connect a : -

answered Nov 13, 2019 by meena.clay6

2 answers

For a cell terminal P.D. is 2.2V when circuit is open and reduces to 1.8V when cell is connected to a resistance of R = 5$\Omega$. Determine internal resistance of cell (r) is then : -

answered Nov 11, 2019 by meena.clay6

1 answer

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

answered Nov 11, 2019 by meena.clay6

1 answer

For a series LCR circuit the power loss at resonance is : -

answered Nov 11, 2019 by meena.clay6

2 answers

Specific resistance of a conductor increases with :

answered Nov 11, 2019 by meena.clay6

1 answer

For the given circuit of P-N junction diode which is correct : ->

answered Nov 11, 2019 by meena.clay6

1 answer

The given truth table is for which logic gate : -

answered Nov 11, 2019 by meena.clay6

1 answer

A whistle revolves in a circle with angular speed $\omega$ = 20 rad/sec 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 the centre : - ($V_{sound }= 340 m/s$)

answered Nov 7, 2019 by meena.clay6

1 answer

A wave travelling in positive X-direction with A = 0.2 m velocity = 360 m/s and $\lambda$ = 60 m, then correct expression for the wave is : -

answered Nov 7, 2019 by meena.clay6

1 answer

For a transistor $\frac{I_C}{I_E}$ = 0.96, then current gain for common emitter configuration : -

answered Nov 7, 2019 by meena.clay6

1 answer

If kinetic energy of a body is increased by 300% than percentage change in momentum will be

answered Nov 7, 2019 by meena.clay6

1 answer

A rod of length is 3m and its mass acting per unit length is driectly proportional to distance x from one of its end then its centre of gravity from th end will be at : -

answered Nov 7, 2019 by meena.clay6

1 answer

A particle (A) is droped from a height and another particle (B) is projected in horizontal direction with speed of 5 m/s from the same height then correct statement is : -

answered Nov 7, 2019 by meena.clay6

1 answer

A lift of mass 1000 Kg which is moving with acceleration of 1 $\frac{m}{s^2}$ in upward direction, then the tension developed in string which is connected to lift is : -

answered Nov 7, 2019 by meena.clay6

2 answers

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

answered Nov 7, 2019 by meena.clay6

2 answers

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

answered Nov 7, 2019 by meena.clay6

1 answer

A body of mass m is placed on earth surface which is taken from earth surface to a height of h = 3R then change in gravitational potential energy is : -

answered Nov 7, 2019 by meena.clay6

1 answer

An object of mass 3kg is at rest. Now a force of F = 6t 2 i + 4t j is applied on the object then velocity of object at t = 3 second is : -

answered Nov 7, 2019 by meena.clay6

1 answer

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

answered Nov 7, 2019 by meena.clay6

1 answer

Unit of Stefan's constant is : -

answered Nov 7, 2019 by meena.clay6

1 answer

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

answered Nov 7, 2019 by meena.clay6

1 answer