If you are preparing for CBSE Class 12 Board Exam Term 1 which will be an objective type questions paper, then you need to practice multiple choice questions of Class 12 Physics Chapterwise. In this article of AKVTutorials, you will get MCQ Questions for Class 12 Physics Chapter 7 Alternating Current with Answer Keys.
MCQ Questions for Class 12 Physics Chapter 7 Question No 1:
Alternating current is transmitted to distant places at
Option A : High voltage and low current
Option B : High voltage and high current
Option C : Low voltage and low current
Option D : Low voltage and high current
Show/Hide Answer
Option A : High voltage and low current
MCQ Questions for Class 12 Physics Chapter 7 Question No 2:
The average e.m.f duration the positive half cycle of an AC supply of peak value E0 is
Option A : E0 / π
Option B : E0 / √2
Option C : E0 / √2 π
Option D : 2 E0 / π
Show/Hide Answer
Option D : 2 E0 / π
MCQ Questions for Class 12 Physics Chapter 7 Question No 3:
The correct graph between the resistance of a conductor with frequency is
Option A :
Option B :
Option C :
Option D :
Show/Hide Answer
Option A :
MCQ Questions for Class 12 Physics Chapter 7 Question No 4:
Voltages across R,L,C are V1 , V2 , V3 respectively. Then the voltage of applied AC source is always equal to
Option A : V1 + V2 + V3
Option B : √ V1 2+ (V2 + V3)2
Option C : V1 – V2 – V3
Option D : √ V1 2+ (V2 – V3)2
Show/Hide Answer
Option D : √ V1 2+ (V2 – V3)2
MCQ Questions for Class 12 Physics Chapter 7 Question No 5:
In series L-C-R resonant circuit, to increase the resonant frequency
option A : L will have to be increased
Option B : C will have to be increased
Option C : LC will have to be decreased
Option D : None
Show/Hide Answer
Option C : LC will have to be decreased
MCQ Questions for Class 12 Physics Chapter 7 Question No 6:
In the circuit shown in the figure, neglecting source resistance, the voltmeter and ammeter readings will respectively be
Option A : 0V, 8 A
Option B : 150 V, 8V
Option C : 150 V, 3V
Option D : 0.V, 3A
Show/Hide Answer
Option A : 0V, 8 A
MCQ Questions for Class 12 Physics Chapter 7 Question No 7:
The r.m.s. value of an ac of 50Hz is 10amp. The time taken by the alternating current in reaching from zero to maximum value and the peak value of current will be
Option A : 2 × 10-2 sec and 14.14 amp
Option B : 1 × 10-2 sec and 7.07 amp
Option C : 5 × 10-3 sec and 7.07 amp
Option D : 5 × 10-3 sec and 14.14 amp
Show/Hide Answer
Option D : 5 × 10-3 sec and 14.14 amp
MCQ Questions for Class 12 Physics Chapter 7 Question No 8:
The magnitude of the emf across the secondary of a transformer does not depend on
Option A : The number of the turns in the primary
Option B : The number of the turns in the secondary
Option C : The magnetic of the emf applied across the primary
Option D : The resistance of the primary and the secondary
Show/Hide Answer
Option D : The resistance of the primary and the secondary
MCQ Questions for Class 12 Physics Chapter 7 Question No 9:
In case of ac circuit, Ohm’s law holds good for
Option A : Peak values of voltage and current
Option B : Effective value of voltage and current
Option C : Instantaneous values of voltage and current
Option D : All the above
Show/Hide Answer
Option D :All the above
MCQ Questions for Class 12 Physics Chapter 1 Question No 10:
In case of AC circuits the relation V = i Z, where Z is impedance, can be directly applied to
Option A : Peak values of voltage and current only
Option B : Runs values of voltage and current only
Option C : Instantaneous values of voltage and current only
Option D : Both 1 and 2 are true
Show/Hide Answer
Option D : Both 1 and 2 are true
| CBSE Class 12 Physics Chapterwise MCQ |
|---|
| 1 : Electric Charge & Fields MCQs | 1 to 10 | 11 to 20 |
| 2 : Electrostatics Potential and Capacitance MCQs | 1 to 10 | 11 to 20 |
| 3 : Current Electricity MCQs | 1 to 10 | 11 to 20 |
| 4 : Moving charges and Magnetism MCQs | 1 to 10 | 11 to 20 |
| 5 : Magnetism and Matter MCQs | 1 to 10 | 11 to 20 |
| 6 : Electromagnetic Induction MCQs | 1 to 10 | 11 to 20 |
| 7 : Alternating Current MCQs | 1 to 10 | 11 to 20 |
| 8 : Electromagnetic Waves MCQs | 1 to 10 | 11 to 20 |
| 9 : Ray Optics and Optical Instruments MCQs | 1 to 10 | 11 to 20 |
| 10 : Wave Optics MCQs | 1 to 10 | 11 to 20 |
| 11 : Dual Nature of Radiation MCQs | 1 to 10 | 11 to 20 |
| 12 : Atoms MCQs | 1 to 10 | 11 to 20 |
| 13 : Nuclei MCQs | 1 to 10 | 11 to 20 |
| 14 : Semi Conductor Electronics MCQs | 1 to 10 | 11 to 20 |
| 15 : Communication Systems MCQs | 1 to 10 | 11 to 20 |
