CBSE Class 12 Current Electricity Multiple Choice Questions with Answers. MCQ Questions Class 12 Current Electricity with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Current Electricity MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Current Electricity with Answers - Set - 2
Question 1:
If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area (a) shall respectively be :
(a) L, 2A
(b) 2A, L/2
(c) 2L, 2A
(d) 2l, A/2
Correct Answer – (A)
Question 2 :
Specific resistance of ali metals is mostly affected by:
(a) temperature
(b) pressure
(c) magnetic field
(d) volume
Correct Answer – (A)
Question 3 :
How many different resistances are possible with two equal resistors?
(a) 2
(b) 3
(c) 4
(d) 5
Correct Answer – (B)
Question 4 :
The resistance of a human body is about:
(a) 12 Ω
(b) 120 Ω
(c) 12 KΩ
(d) 120 MΩ
Correct Answer – (C)
Question 5 :
In an experiment to measure the internal resistance of a cell by a potentiometer, it is found that the balance point is at a length of 2 m, when the cell is shunted by a 5Ω resistance and is at 3 m when the cell is shunted by a 10Ω resistance. The internal resistance of the cell is:
(a) 10 Ω
(b) 15 Ω
(c) 1 Ω
(d) 1.5 Ω
Correct Answer – (A)
MCQ Questions Class 12 Current Electricity with Answers
Question 6 :
The example of a non-ohmic resistance is:
(a) copper wire
(b) fi lament lamp
(c) carbon resistor
(d) diode
Correct Answer – (D)
Question 7 :
Given three equal resistors, how many different combinations (taken all of them together) can be made?
(a) 3
(b) 4
(c) 5
(d) 6
Correct Answer – (B)
Question 8 :
The number of electrons that constitute 1 A of current is:
(a) 6.25 × 1016
(b) 6.25 × 1017
(c) 6.25 × 1018
(d) 6.25 × 1019
Correct Answer – (C)
Question 9 :
The speed at which tjie current travels in a conductor is nearly:
(a) 3 × 104 ms-1
(b) 3 × 106 ms-1
(c) 3 × 108 ms-1
(d) 3 × 1010 ms-1
Correct Answer – (A)
Question 10 :
The effective wattage of 60 W and 40 W lamps connected in: (A) series is equal to:
(a) 24 W
(b) 20 W
(c) 100 W
(d) 80 W.
Correct Answer – (A)
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