PART - 2 CH - 10 Thermal Properties of Matter — Physics STD 11 Science — Question

Light from a point source falls on a screen. If the separation between the source and the screen is increased by 1%, the illuminance will decrease (nearly) by:

1. 0.5%
2. 1%
3. 2%
4. 4%

A glass of water has an ice cube floating in water. The water level just touches the rim of the glass. will the water overflow when the ice melts? 

Explain why does a cyclist bend inwards while riding along a curved road?

Can the relative velocity of a moving body be zero with respect to another body? Give examples

If the speed of a rod moving at a relativistic speed parallel to its length is doubled,

1. The length will become half of the original value.
2. Mass will become double of the original value.
3. The length will decrease.
4. The mass will increase.

When air is blown in between two balls suspended close to each other, they are attracted towards each other. Give reason.

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum, (d) kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.

At what inclination should a player throw the ball from horizontal so that the ball travels the maximum distance?

How is the path difference related to phase difference?

Can the image formed by a simple microscope be projected on a screen without using any additional lens or mirror?