Physics Test - ...

A light bulb and an open coil induction are connected in series to an ac source as shown in figure. Now an iron rod is inserted into the interior of the inductor. The glow of the light bulb:

The ratio of the speed of wavefront in medium \(1\) to medium \(2\) is \(4\). Find the refractive index of medium \(1\) with respect to medium \(2\).

Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?

A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet, their respective kinetic energies will be in the ratio of:

The ratio of secondary of primary turns of step up transformer is 4 : 1. If a current of 4A is applied to the primary, the induced current in the secondary will be:

A satellite of mass m is orbiting around earth at a height h above the surface of the earth. Mass of earth is M and it’s radius is R. The angular momentum is independent of which of the following terms:

While teaching in a class Mayank ask a question on the equilibrium of particle as shown in the figure and ask the student to find the weight of a body, if T₂ = 100 N. Shreya gives the correct answer. So, what is the answer given by Shreya? 

A uniform rope of length L is lying in a lump on a frictionless table. A small part of the rope is held hanging through a hole in the table just below the lump. The system is then released. The speed of the end of the rope, as it leaves the hole, is:

What is the correct expression for Binding energy of a satellite.

On a new scale of temperature called the W scale, the freezing and boiling points of water are 39°W and 239°W respectively. What will be the temperature on the new scale, corresponding to a temperature of 39°C?