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NEET JEE TGT PGT NVS KVS MCs lecture 1...

NEET JEE TGT PGT NVS KVS MCs lecture 1

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An AC voltage source described by V=10cos(pi/2)t is connected to a 1muF capacitor as shown in figureure. The key K is closed at t=0 . the time (tgt0) after which the magntitude of current I reaches its maximum value for the first time is .

If total cost function is given by C = a + bx + cx^2 , where x is the quantity of output. Show that: d/(dx)(AC) = 1/x (MC-AC) , where MC is the marginal cost and AC is the average cost.

A physicist was performing experiments to study the velociyt and wavelength of the electron. In one case, the electron was accelerated through a potential differences of 1 KV and in second case it was accelerated through a potential difference of 2KV. The velocity acquired by the electron will be

A particle of mass 2 kg charge 1 mC is projected vertially with velocity k 10 ms^-1 . There is as uniform horizontal electric field of 10^4N//C, then

A particle of mass 2 kg chrge 1 mC is projected vertially with velocity k 10 ms^-1 . There is as uniform horizontal electric field of 10^4N//C, then

A particle of mass 2 kg chrge 1 mC is projected vertially with velocity k 10 ms^-1 . There is as uniform horizontal electric field of 10^4N//C, then

An X-ray tube is operating at 150 kV and 10 mA. If only 1% of the electric power supplied is converted into X-rays, the rate at which the target is heated in calories per second is

The dielectric permittivity of gaseous argon at standard conditions is 1.00054. Find the dipole moment of an argon atom in an electric field of 10 kV/m. Compare with the dipole moment of a water molecule.

An electron accelerated in an electric field of 20 kV enters a uniform magnetic field with induction 0.1 T. Its velocity vector makes an angle of 75^@ with the magnetic field vector. Find the shape of the path.

A particle of mass 2 g and charge 1 muC is held at rest on a frictionless surface at a distance of 1m from a fixed charge of 1 mC. If the particle is released it will be repelled. The speed of the particle when it is at distance of 10 m from fixed charge is :