Gravitation — Physics STD 11 Science — Question

Consider the situation described in the previous problem. Suppose the current i enters the loop at the point A and leaves it at the point B. Find the magnetic field at the centre of the loop.

In a flywheel, most of the mass is concentrated at the rim. Explain why?

How much is the Modulus of Rigidity of a fully rigid body?

Read each statement below carefully and state, with reasons and examples, if it is true or false:

A scalar quantity is one that

Has the same value for observers with different orientations of axes.

A pipe 20cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a source of 1237.5Hz?(sound velocity in air = 330ms^–1)

A sphere of radius 1.00cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is 0.5W/cm^-2. If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.

What is atomic mass unit (a.m.u.)?

A body of mass 2kg initially at rest moves under the action of an applied horizontal force of 7N on a table with coefficient of kinetic friction = 0.1. Compute the:
Change in kinetic energy of the body in 10s.

What is the reactance of a capacitor connected to a constant DC source?