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 - 3
Question 1:
Kirchhoffs first and second laws for electrical circuits are consequences of:
(a) conservation of energy
(b) conservation of electrical charge and energy respectively
(c) conservation of electric charge
(d) neither conservation of energy nor electric charge
Correct Answer – (B)
Question 2 :
Two wires of copper are of the same length but’have different diameters. When they are connected in series across a battery, the heat generated is H1 When connected in parallel across the same battery, the heat generated during the same time is H2 Then :
(a) H1 = H2
(b) H1 < H2
(c) H1 > H2
(d) H1 > H2
Correct Answer – (B)
Question 3 :
How much electric energy is consumed by a 100 W lamp used for 6 hours everyday for 30 days?
(a) 18 kJ
(b) 18 kWh
(c) 1.8 J
(d) None of these
Correct Answer – (B)
Question 4 :
The length of a conductor is halved, the conductance:
(a) halved
(b) doubled
(c) unchanged
(d) quadrupled
Correct Answer – (B)
Question 5 :
A wire of resistance 3 Ω is cut into three pieces, which are then joined to form a triangle. The equivalent resistance between any corners of the triangle is :
(a) 2/3 Ω
(b) 3/2 Ω
(c) 1/2 Ω
(d) 1/3 Ω
Correct Answer – (A)
MCQ Questions Class 12 Current Electricity with Answers
Question 6 :
In questions 135, w hen the wires are connected in series, the heat produced in the thinner wire is H1 and that in the thicker wire is H2. Then :
(a) H1 = H2
(b)H1 < H2
(c) H1 > H2
(d) H1 > H2
Correct Answer – (C)
Question 7 :
(a) 1
(b) 2
(c) 1/2
(d) 1/4
Correct Answer – (C)
Question 8 :
Siemen is the unit of:
(a) resistance
(b) conductance
(c) specific conductance
(d) None of these
Correct Answer – (B)
Question 9 :
The length of a conductor is halved. Its resistance will be :
(a) halved
(b) doubled
(c) unchanged
(d) quadrupled
Correct Answer – (A)
Question 10 :
The specific resistance of a rod of copper as compared to that of thin wire of copper is :
(a) less
(b) more
(c) same
(d) depends upon the length and area of cross-section of the wire
Correct Answer – (C)
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