Current Electricity | Practice MCQs Physics for Mdcat | mosaicbro.com

Current Electricity | Practice MCQs Physics for Mdcat

7 of 85 questions (Page 2 of 13)

Filter by Category

8 The average velocity gained by the electrons in a conductor placed in an electric field is called:
Correct Answer: C
Explanation: Drift velocity is the net average velocity of electrons in a conductor under an electric field.
9 Electronic or electric current ‘I’ in a conductor is defined by the relation:
Correct Answer: B
Explanation: Current is defined as charge flow per unit time: $I = \frac{Q}{t}$.
10 Ampere is a current in which charges flow across any cross-section at the rate of:
Correct Answer: C
Explanation: 1 Ampere = 1 Coulomb per second ($CS^{-1}$).
11 Current per unit area is called:
Correct Answer: A
Explanation: Current density is defined as current per unit cross-sectional area.
12 The SI unit of current density is:
Correct Answer: B
Explanation: Current density is measured in Amperes per square meter ($A/m^2$).
13 If one ampere current flows through 2m long conductor, the charge flow through this in one hour will be:
Correct Answer: C
Explanation: Charge = Current × Time = $1A × 3600s = 3600 C$.
14 The relation V = IR represents:
Correct Answer: B
Explanation: V = IR is the mathematical form of Ohm’s law.
MCQs Bank by mosaicbro.com