Physics - Study Mode

[#566] The S.I. unit of electric charge is :
Correct Answer

(B) Coulomb

Explanation

Solution: Electric charge has the dimension electric current time. The SI derived unit of electric charge is the coulomb, which is defined as an ampere second.

[#567] Indicate the false statement about the resistance of a wire
Correct Answer

(C) It is directly proportional to the area of cross-section of wire

Explanation

Solution: It is directly proportional to the area of cross-section of wire is a false statement.

[#568] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
Correct Answer

(C) Ohms law

Explanation

Solution: According to Ohm’s Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it. The proportionality constant R, is the resistance of the conductor. Thus, V α I or V = I × R or I = V/R or R = V/I.

[#569] What is the SI unit of electric current?
Correct Answer

(C) Ampere

Explanation

Solution: SI unit of electric current is Ampere.

[#570] The rate of flow of electric charge is measured in
Correct Answer

(A) Ampere

Explanation

Solution: The rate of flow of electric charge is measured in Ampere.