Units and Measurements — Physics STD 11 Science — Question

What will be the work done by force of gravity in lifting a 10 kg mass to a height of 10 m ?

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%

How many Joules of mechanical work is required to obtain one calorie of heat?

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.

Sometimes it is said that "heat is developed" in a resistance when there is an electric current in it. Recall that heat is defined as the energy being transferred due to temperature difference. Is the statement in quotes technically correct?

You can create waves in any pond by throughing any stone then source of energy of waves.

Should the value of escape velocity be less or more on the surface of Moon as compared to Earth?

Three containers have different area on the top surface and same base area. If equal volume of a liquid is put in them which will have more pressure at its base?

Fill in the blanks using the word (s) from the list appended with statement:
For solids with elastic modulus of rigidity, the shearing force is proportional to . . . while for fluids it is proportional to . . . (shear strain/ rate of shear strain).

Name at least seven physical quantities whose dimensions are ML²T^-2.