Physics Test - ...

During projectile motion, the horizontal velocity

The depletion layer in a p-n junction diode is 10-6m wide and its knee potential is 0.5 V. What is the inner electric field in the depletion region?

A train of length 80 m is moving with a uniform velocity of 25 m/sec. The time taken by the train to cross a bridge 120 m long is

An incompressible fluid flows steadily through a cylindrical pipe which has radius '2R' at a point 'A' and radius 'R' at a point 'B'. If the velocity at point 'A' is 'v' along the flow of direction, what will be its velocity at point 'B'?

A sound wave reflected at the boundary will undergo a phase change on reflection at

A source is moving towards an observer with a speed of 20 m/s and having frequency 240 Hz, and the observer is moving towards the source with a velocity of 20 m/s. What is the apparent frequency heard by the observer, if velocity of sound is 340 m/s?

Two circular coils 1 and 2 are made from the same wire, but the radius of the 1st coil is twice that of the 2nd coil. What is the ratio of potential differences applied across them, so that the magnetic field at their centres is the same?

A shell at rest, at the origin explodes into three fragments of masses 1 kg, 2 kg and m kg. The pieces weighing 1 kg and 2 kg fly off with a speed of 5 ms–1along x– axis and 6 ms–1along y– axis respectively. If the 'm' kg piece flies off with a speed of 6.5 ms–1, what must be the total mass of the shell?

For the given circuit to act as a full-wave rectifier, the AC input should be connectedacross ..i... and ..ii... and the DC output should appear across ...iii... and ...iv....

i, ii, iii and iv, respectively, are

If the velocity of light 'c', gravitational constant 'G' and Planck's constant 'h' are chosen as fundamental units, the dimensions of length 'L' in the new system are