PART - 1 CH - 6 System of Particles and Rotational Motion — Physics STD 11 Science — Question

Given a + b + c + d = 0, which of the following statements are correct:b + c must lie in the plane of a and d if a and d are not collinear, and in the line of a and d, if they are collinear?

State if the following statements is true or false. Give reasons for your answer: In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system.

What is the work done by earth's gravitational force in keeping the moon in its orbit?

What happens to surface tension, when impurity is mixed in liquid?

What is the height at which the satellite is to be parked for it to be a geostationary satellite?

An electrolysis experiment is stopped and the battery terminals are reversed:

A long solenoid is fabricated by closely winding a wire of radius 0.5mm over a cylindrical nonmagnetic frame so that the successive turns nearly touch each other. What would be the magnetic field B at the centre of the solenoid if it carries a current of 5A?

Why does a pilot not fall down when his aeroplane takes a vertical loop?

Do A and A.U. stand for same length?

Mark the correct options.

1. Luminous flux and radiant flux have same dimensions.
2. Luminous flux and luminous intensity have same dimensions.
3. Radiant flux and power have same dimensions.
4. Relative luminosity is a dimensionless quantity.