Physics - Study Mode

[#1101] When a vehicle passes, TV reception gets distorted. This is because
Correct Answer

(B) Spark plug creates electromagnetic disturbances

Explanation

Solution: This is caused due to the interference caused by the electromagnetic waves generated by a passing vehicle. These waves were within the same frequency range as that of the waves of TV reception and hence caused Interference. interference is a phenomenon in which two waves superimpose to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency. Interference effects can be observed with all types of waves, for example, light, radio, acoustic, and surface water waves and due to the interference caused by the vehicle electromagnetic disturbances occurs in the TV reception and gets distorted.

[#1102] The unit of magnetic permeability is
Correct Answer

(A) Henry/meter

Explanation

Solution: In SI units, permeability is measured in Henry per meter (H/m).

[#1103] An Electric generator is based on which of the following scientific principles?
Correct Answer

(A) Faraday's law of Electromagnetic Induction

Explanation

Solution: An Electric generator works on the principle of Faraday's law of Electromagnetic Induction.

[#1104] Planck's constant has the dimensions of :
Correct Answer

(C) Angular momentum

Explanation

Solution: Planck's constant , often denoted as "h," has the dimensions of angular momentum . It is a fundamental physical constant used in quantum mechanics to relate the energy of a photon to its frequency. Planck's constant is represented by the equation: E=h⋅f Where: E represents energy, h is Planck's constant, f is the frequency of the photon. The dimensions of Planck's constant (h) are the product of energy and time (ET), and it is often expressed in units like joule-seconds (J·s). Angular momentum also has the dimensions of energy multiplied by time (ET).

[#1105] What is the unit of Magnetic Induction?
Correct Answer

(D) Henry

Explanation

Solution: Henry is the unit of Magnetic Induction.