Gravitation — Physics STD 11 Science — Question

What is the weight of a person standing in a freely falling elevator?

Obtain the dimensional formula for coefficient of viscosity.

When a dielectric slab is gradually inserted between the plates of an isolated parallel-plate capacitor, the energy of the system decreases. What can you conclude about the force on the slab exerted by the electric field?

Give an example of uniformly accelerated linear motion.

A brick weighing 4.0kg is dropped into a 1.0m deep river from a height of 2.0m. Assuming that 80% of the gravitational potential energy is finally converted into thermal energy, find this thermal energy is calorie.

Is it possible to double the length of a metallic wire by applying a force over it?

When a source moves at a speed greater than that of sound, will Doppler formula hold? What will happen?

A point charge q is placed in a cavity in a metal block. If a charge Q is brought outside the metal, will the charge q feel an electric force?

Find the area of the circle of radius 3.458cm upto correct significant figures.