Punjab 12th Class Physics Chapter 5 A.C. Circuit Mcqs Test Online Punjab 12th Class Physics Chapter 5 A.C. Circuit Mcqs Test Online 12345678910111213Show paginator Hide paginator Question 1 of 13Physics 1. In an LRC circuit, the capacitance is made one-fourth, when in resonance. Then what should be change in inductance, so that the circuit remains in resonance? 1.4 times 2.2 times 3.8 times 4.¼ times Question 1 of 13Question 2 of 13 2. The peak value of alternating current is 5√2 A. the mean square value of current will be: 1.5A, 2.2.5A, 3.5²A4.5√2A Question 2 of 13Question 3 of 13 3. In LR current which one of the following statement is correct? 1.R value increases with frequency 2.None of these 3.The inductive reactance decreases with frequency 4.L and R oppose each other Question 3 of 13Question 4 of 13 4. An electromagnetic wave goes from air to glass which of the following does not change? 1.X-rays 2.Radio waves 3.Ultra violet radiation 4.Ultra sound waves Question 4 of 13Question 5 of 13 5. The circuit in which current and voltage are in phase, the power factor is: 1.Zero 2.1 3.2 4.-1 Question 5 of 13Question 6 of 13 6. An alternating quantity (voltage or current) is completely known if we know it’s: 1.Both a and b 2.Frequency and phase 3.Effective value 4.Maximum value Question 6 of 13Question 7 of 13 7. The AC system is preferred to DC system because: 1.AC voltage can be easily changed in magnitude 2.High voltage AC transmission is less efficient 3.DC motor angular velocity is effected badly 4.Domestic appliances require AC voltage for their operation Question 7 of 13Question 8 of 13 8. An alternating voltage is given by 20 sin 157 t. the frequency of alternating voltage is: 1.50Hz 2.25Hz 3.75Hz4.100Hz Question 8 of 13Question 9 of 13 9. The phase difference between the current and voltage at resonance is: 1.- π 2.0 3.π/2 4.π Question 9 of 13Question 10 of 13 10. In choke coil the reactance Xt and resistance R are: 1.Xt, = N2.Xt, = R 3.Xt, = <4.Xt,>>R Question 10 of 13Question 11 of 13 11. For electromagnetic waves, Maxwell generalized: 1.Faradays law 2.Amperes law 3.Gausses law for electricity 4.Gausses law for magnetism Question 11 of 13Question 12 of 13 12. A capacitor is perfectly insulator for: 1.Direct as well as alternating current 2.Direct current 3.Alternating current 4.None of these Question 12 of 13Question 13 of 13 13. In AC system we generate since wave form because: 1.It can be easily draw 2.It produces least disturbance in electrical circuits 3.It is nature standard 4.Other waves cannot be produced easily Question 13 of 13 Loading... Test By Subject Punjab Test By Topics 12th Class Physics You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.