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Subject: Physics, asked on 21/12/17

39 is my doubt.

Subject: Physics, asked on 21/12/17

Solve 44 and 45

Subject: Physics, asked on 21/12/17

26 solve

Subject: Physics, asked on 21/12/17

Solve 21 and 24
 

Subject: Physics, asked on 21/12/17

20 and 22 are my doubts.

Subject: Physics, asked on 16/12/17

The displacement of particle performing simple harmonic motion is given by, x = 8 sin wt + 6 cos wt, where  distance is in cm and time is in second. The amplitude of motion is
(a) 10 cm                  (b) 14 cm                (c) 2 cm                      (d) 3.5 cm

Subject: Physics, asked on 16/12/17

Q.  The period of oscillation of a mass M, having from a spring of force constant k is T. When additional mass m is attached to the spring, the period of oscillation becomes 5T/4. m/M = 

Subject: Physics, asked on 13/12/17

The force F experienced by a particle of charge e moving with a velocity v in a magnetic field B is given by F= e(vxb). Name the pairs of vectors which are always at right angles to each other.

Subject: Physics, asked on 11/12/17

A pendulum bob has mass m .The length of the pendulum is f. It is initially at rest. A particle P of mass m/2 moving horizontally along -ve x-direction with velocity root(2gf) collides with the bob and comes to rest momentarily, another particle Q of mass m moving horizontally long z-direction collides with the bob and stick to it. It is observed that bob now move in horizontal circle. The floor is a horizontal surface at a distance2l below the point of suspension of the pendulum.

Subject: Physics, asked on 10/12/17

with the help of a block diagram explain the production of amplitude modulated wave

Subject: Physics, asked on 8/12/17

solve & don't give any links


 

Subject: Physics, asked on 7/12/17

An infinitely long wire of uniform cross section carries a current whose current density varies as j=brα. where b=107πunit, α=. 1 unit and r the distance from axis. The magnetic induction at a distance 0.25 from axis is given by n×53x10-2 tesla. Find n

Subject: Physics, asked on 23/11/17

If a current carrying solenoid is compressed to half its length, the energy stored in its magnetic field is doubled. What is the source of this additional energy?

Subject: Physics, asked on 23/11/17

Q. A steady current from a source of emf is passing through a straight conductor from left to right. If the source in switched off, what will be the direction of induced current in the wire? 
No links

Subject: Physics, asked on 23/11/17

Q. ​When the N-pole of a bar magnet advances towards a stationary current carrying circular coil along its axis, its motion is damped. Explain why it is so?

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