Physics - Study Mode

[#716] Rectifiers are used to convert:
Correct Answer

(B) Alternating current to Direct current

Explanation

Solution: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification, since it "straightens" the direction of current.

[#717] Out of the following, which is not emitted by radioactive substance?
Correct Answer

(D) Neutrons

Explanation

Solution: Out of the following neutrons is not emitted by radioactive substance.

[#718] When all the forces and torques are balanced in a mechanical body it is said to be in
Correct Answer

(A) Equilibrium

Explanation

Solution: When all the forces and torques are balanced in a mechanical body it is said to be in equilibrium.

[#719] Centrifugal force increases with
Correct Answer

(C) Acceleration

Explanation

Solution: Centrifugal force can be increased by increasing either the speed of rotation or the mass of the body or by decreasing the radius, which is the distance of the body from the centre of the curve.

[#720] The minimum number of forces to keep a particle in equilibrium is
Correct Answer

(B) 2

Explanation

Solution: Two are the minimum number of forces of equal magnitude ina plane that keep a particle in equilibrium.