CBSE Class 12 Alternating Current Multiple Choice Questions with Answers. MCQ Questions Class 12 Alternating Current with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Alternating Current MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Alternating Current with Answers - Set - 3
Question 1:
The no. of turns in the primary coil of a transformer is 200 and the no. of turns in the secondary is 10. If 240 V a.c. is applied to primary, the output from the secondary
(a) 6 V
(b) 12 V
(c) 24 V
(d) 48 V
Correct Answer – (B)
Question 2 :
In series resonant circuit:
(a) reactance is zero
(b) current is zero
(c) voltage is zero
(d) None of these
Correct Answer – (D)
Question 3 :
An acceptor circuit is :
(a) series resonant circuit
(b) parallel resonant circuit
(c) LCR circuit
(d) None of these
Correct Answer – (A)
Question 4 :
An iron core transformer with a turns ratio of 8 : 1 has 120 V applied across the primary. The voltage across the
(a) 15 V
(b) 120 V
(c) 180 V
(d) 960 V
Correct Answer – (A)
Question 5 :
The dimensional formula of impedance is;
(a) [ML2T-2A-2]
(b) [ML2T-3A-2]
(c) [ML2T-2A-1]
(d) [ML2T-2A-3]
Correct Answer – (B)
MCQ Questions Class 12 Alternating Current with Answers
Question 6 :
In parallel resonant circuit:
(a) impedance is very high
(b) current is very high
(c) voltage is very high
(d) None of these
Correct Answer – (A)
Question 7 :
A broadcast circute broadcasts at 300 m band. A condenser of capacitance 2.4 lµF is available. The value of the inductance required for resonant circuit is:
(a) 10-4 H
(b) 10-8 H
(c) 10-6 H
(d) 10-2 H
Correct Answer – (B)
Question 8 :
What is the ratio of inductive and capacitance reactances in an ac circuit?
(a) 1
(b) ω²L
(c) ω²LC
(d) l
Correct Answer – (C)
Question 9 :
Energy dissipates in LCR circuit in :
(a) L only
(b) C only
(c) R only
(d) All of the above
Correct Answer – (C)
Question 10 :
Which of the following has dimensions different from the rest?
(a) L/R
(b) 1/RC
(c) √LC
(d) RC
Correct Answer – (B)
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