Alternating Current Objective Questions In English

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Alternating Current Objective Questions In English

1. The dimensional formula of impedance is

(A) [ML²T^-2A^-2]
(B) [ML²T^-3A^-2]
(C) [ML²T^-2A^-1]
(D) [ML²T^-2A^-3]

Show Answer

(B) [ML²T^-3A^-2]

2. The thermal effect of alternating current is practically

(A) Joule heating
(B) Peltier heating
(C) Thomson effect
(D) None

Show Answer

(A) Joule heating

3. The power factor of a choke coil is about

(A) 90°
(B) 0
(C) 1
(D) 180°

Show Answer

(B) 0

4. The power factor of a condenser is

(A) 90°
(B) 0
(C) 1
(D) 180°

Show Answer

(D) 180°

5. S.I. unit of Impedance is

(A) henry
(B) ohm
(C) tesla
(D) none

Show Answer

(B) ohm

6. The equation of an AC is I = 60sin100πt. The root mean square value will be

(A) 60√2
(B) 60 / √2
(C) 100
(D) 0

Show Answer

(B) 60 / √2

7. The value of phase difference between current and emf in an AC circuit with resistance only

(A) π / 2
(B) 0
(C) π
(D) 2π

Show Answer

(B) 0

8. The unit of reactance is

(A) ohm
(B) farad
(C) ampere
(D) mho

Show Answer

(A) ohm

9. The unit of capacitive reactance is

(A) farad
(B) ohm
(C) maxwell
(D) ampere

Show Answer

(B) ohm

10. The frequency of alternating current supply in India is

(A) 50 hertz
(B) 40 hertz
(C) 100 hertz
(D) 150 hertz

Show Answer

(A) 50 hertz

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Class 12 Physics Mcq In English | Related Post

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Alternating Current Objective Questions In English Medium Pdf Download | Class 12 Physics Mcq In English

Pattern Based	Bihar Board, Patna
Class	12^thor Inter
Category	Class 12 Physics Mcq
Chapter Name	Alternating Current
Subject	Physics Class 12th
Class 12^th English Summary	BSEB Class 12th English Summary
Class 10^th Science All Chapter Objective Question	Click Hare
Type Of Question	Objective Question \|\| 01 Marks
Script	Hindi And English Medium
Published On	Bihari Academy