Physics Test - ...

Find the velocity of the point as a function of time and as a function of the distance covered s.

A neutron decays to a proton and an electron. Find the fraction of energy gone to proton if total energy released is k.mp=1836me.

For an amplitude modulated wave, the maximum amplitude is found to be 12V and minimum amplitude is found to be 4V. The modulation index of this wave is __________ %.

A bullet weighing 50 gm leaves the gun with a velocity of 30 ms−1−1. If the recoil speed imparted to the gun is 1 ms−1−1, the mass of the gun is:

Two charges are placed a certain distance apart in air. Ifa glass slab is introduced between them, the force between them will.

The angle of contact between glass and water is 0o and water (surface tension 70dyn/cm) rises in a glass capillary upto to 6cm. Another liquid of surface tension 140 dyne/cm, angle of contact 600 and relative density 2 will rise in the same capillary up to.

A capillary tube is dipped in water up to length l, the level of water reaches up to height h. Now the end which is inside the water is closed and the capillary tube is put out side the water  and that closed end is opened if l > h, the height of the remaining water column in the capillary will be:

The flux linked with a coil at any instant 't' is given by ϕ=10t2−50t+250. The induced emf at t=3s is:

Two parallel large thin metal sheets have equal surface charge

densities (σ=26.4×10−12c/m2) of opposite signs.

The electric field between these sheets is:

A conducting square loop of side ll and resistance R moves in its plane with a uniform velocity vv perpendicular to one of its sides. A uniform and constant magnitude field B exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is: