Laws of Motion — Physics STD 11 Science — Question

Give the dimensional formula of 'g' and 'G'.

What is temperature gradient?

In a dispersive medium, how will you express the velocity of wave motion?

Why is the nib of a pen split?

The brightness producing capacity of a source:

1.  Does not depend on its power.
2.  Does not depend on the wavelength emitted.
3.  Depends on its power.
4.  Depends on the wavelength emitted.

The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative:
Work done by friction on a body sliding down an inclined plane.

Suppose we define a quantity 'Linear Pomentum' as linear pomentum = mass × speed. The linear pomentum of a system of particles is the sum of linear pomenta of the individual particles. Can we state a principle of conservation of linear pomentum as ''linear pomentum of a system remains constant if no external force acts on it?''

Commercial unit of power kWh is equal to ­________.

Consider the following two statements:

1. Free-electron density is different in different metals.
2. Free-electron density in a metal depends on temperature.

Seebeck effect is caused

1. Due to both A and B.
2. Due to A but not due to B.
3. Due to B but not due to A.
4. Neither due to A nor due to B.