Laws of Motion — Physics STD 11 Science — Question

Underline the correct alternative:
When a conservative force does positive work on a body, the potential energy of the body increases/ decreases/ remains unaltered.

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?

Why machines are sometimes jammed in winter?

What is the angle between the equatorial plane and the orbital plane of Polar satel lite?

Express a joule in terms of fundamental unit.

Is it possible to put a satellite into its orbit by firing it from a huge sized gun?

How can the surface tension of water be reduced?

The force of attraction between earth and any object lying on or near its surface is known as ­­__________.

Draw v-t graph for non-uniform accelerated motion.

Tires have stronger grip on a flat road than when climbing a sloping road. Explain