Physics Test 21...

The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity ω is

Two point charges, q and 4q are held a distance 'r' apart. The electric field due to them is zero at a distance

What should be the angle of banking of the road if a vehicle, travelling with speed v, negotiates a curve of radius r?

Let there be a spherically symmetric charge distribution with charge density varying as  where r is the distance from the origin. The electric field at a distance r(rltR) from the origin is given by

Electromagnetic waves are transverse in nature, is evident by

A car is moving on a straight road. If its engine is delivering constant power, then the distance covered by the car in time t is proportional to

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then, the true statement about the scale reading is

Two particles starting from a point on a circle of radius 4 m in a horizontal plane move along the circle in opposite directions with constant speeds of 4 ms^-1 and 6 ms^-1. The particles will collide with each other in

Which of the following represents the Boolean function for the given circuit of gates?

When a system is taken from state i to state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. Along the path ibf, Q = 36 cal. W along the path ibf is