Physics Laws quiz

Hint

Answer

Any two point charges exert an electrostatic force on eachother that is directly proportional to the product of their charges and inversely proportional to the square of their separation

The magnitude of the induced e.m.f. is directly proportional to the rate of change of magnetic flux linkage

The force applied is directly proportional to the extension of the spring, unless the limit of proportionality is exceeded

The recessional speed v of a galaxy is directly proportional to the distance d from Earth

The orbit of a planet is an ellipse, with the Sun at one of the two foci

A line segment connecting the planet to the Sun sweeps out equal areas during equal intervals of time

The square of the orbital period T of a planet is directly proportional to the cube of its average distance r from the Sun

At any point in an electrical circuit, the sum of the currents into a point is equal to the sum of the currents out of a point; electrical charge is conserved

In a closed loop of an electrical circuit, the sum of the e.m.f.s is equal to the sum of the p.d.s

Hint

Answer

The direction of the induced e.m.f. or current is always such to oppose the change producing it

A body will remain at rest or continue to move at a constant velocity unless acted upon by a resultant force

The rate of change of momentum of an object is directly proportional to the resultant force, and takes place in the direction of the force

Who two objects interact, each exerts an equal but opposite force on the other during interaction

The force between two point masses is directly proportional to the product of the masses and inversely proportional to the separation between them

The potential difference across a conductor is directly proportional to the current in the conductor, so long as temperature remains constant

For a body in rotational equilibrium, the sum of the anti-clockwise moments is equal to the sum of the clockwise moments about the same point

The peak wavelength at which the intensity of radiation from a black body is a maximum and is inversely proportional to the absolute temperature T of the black body