Bihar Board - Class 12 Physics - Chapter 3: Electric Current Multiple Choice Questions (MCQs)
For Class 12 Bihar Board, the chapter Electric Current in Physics explain the flow of electric charge, Ohm’s law, resistance, and the analysis of electrical circuits using Kirchhoff’s laws. You can find multiple-choice questions that help in mastering these topics and preparing effectively for exams on Vidyakul.
Multiple Choice Question
1. What is the order of magnitude of the resistance of a dry human body?
(A)10 Ω
(B)104 Ω
(C)10 MΩ
(D)10 μΩ
Answer: (B)104 Ω
2. The material which has the property of becoming electrically polarized in response to an applied mechanical stress is termed as
(A)Ferroelectric
(B)Piezoelectric
(C)Optoelectronic
(D)Superconducting
Answer: (B) Piezoelectric
3. The rate of flow of electric charge through any cross-section of a conductor is known as __________.
(A)Electric flux
(B)Electric potential
(C)Electric current
(D)Electric field
Answer: (C)Electric current
4. Mobility is denoted by __________.
(A)
(B)
(C)
(D)
Answer: (C)
5. Which of the following is non-ohmic resistance?
(A)Lamp filament
(B) Copper wire
(C)Carbon resistor
(D) Diode
Answer: (D) Diode
6. Unit of conductance is __________.
(A)Dyne
(B) Siemen
(C)Ohm
(D)Volts
Answer: (B) Siemen
7. Current density is a __________.
(A)scalar quantity.
(B) vector quantity.
(C)dimensionless quantity.
(D) none of these options
Answer: (B) vector quantity.
8. The resistivity of certain metals or alloys drops to zero when they are cooled below a certain temperature, this phenomenon is known as __________.
(A)Conductivity
(B)Partial conductivity
(C)Superconductivity
(D) Non-conductivity
Answer: (C) Superconductivity
9. State true or false:
The total resistance in the series combination is more than the greatest resistance in the circuit.
(A) True
(B) False
Answer: (A) True
10. The opposition offered by the electrolyte of the cell to the flow of current through itself is known as __________.
(A) External resistance
(B)Internal resistance
(C)Non-resistance
(D)None of these options
Answer: (B)Internal resistance
11. The rate of flow of charge per unit time is called as
(A) Electric field
(B) Electric current
(C) Electric potential
(D) Electric charge
Answer: ( B) electric current
12. The SI unit of Current is
(A) C
(B) V
(C) A
(D) N
Answer: (C) A
13. The materials which produces electric current in them when electric field is applied to them are called as
(A) Insulators
(B) Semiconductor
(C) Conductors
(D) None
Answer: (C) conductors
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