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Alternating Current Electromagnetic Waves Test Online

Test Name Alternating Current & Electromagnetic Waves Test
Subject Physics
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Alternating Current & Electromagnetic Waves Test are available. Attempt online Multiple Choice Questions of Alternating Current & Electromagnetic Waves over here.

Alternating Current & Electromagnetic Waves Test Online


1. In a AC circuit the voltage and current are described by V = 200 sin (319t – π/6) volts and i = 50sin (314t + π/6)mA respectively. The average power dissipated in the circuit is:


Question 1 of 15

2. In a circuit the coil of a choke:


Question 2 of 15

3. An AC source of angular frequency ω is fed across a resistor R and a capacitor C in series. The current registered is I. If now the frequency of source is changed to ω/3 (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency ω


Question 3 of 15

4. In an AC circuit the potential differences across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference of the source is:


Question 4 of 15

5. An inductor coil of inductance L is cut into two equal parts and both the parts are connected in parallel. The net inductance is:


Question 5 of 15

6. The circuit shown below acts as:



Question 6 of 15

7. If we decrease the frequency of the applied A.C. with a purely capacitive load, do (1) the amplitude of Vc and (2) amplitude of Ic increase, decrease of remain the same.


Question 7 of 15

8. Which wavelength of sun is used finally as electric energy?


Question 8 of 15

9. A capacitor of capacitance 2μF is connected in the tank circuit of an oscillator oscillating with a frequency of 1 kHz. If the current flowing in the circuit is 2 m A, the voltage across the capacitor will be:


Question 9 of 15

10. In the circuit shown below what will be the reading of the voltmeter and ammeter? (Total impedance of circuit Z = 100




Question 10 of 15

11. An A.C. circuit containing only capacitance, the current:


Question 11 of 15

12. A coke coil has:


Question 12 of 15

13. A 50 Hz a.c. source of 20 volt is connected across R and C as shown in figurer. The voltage across R is 12 volt. The voltage across C is:


Question 13 of 15

14. According to Maxwell’s hypothesis, changing of electric field give rise to:


Question 14 of 15

15. The pressure exerted by an electromagnetic wave of intensity 1 (watt/m²) on a non-reflecting surface is: [c is the velocity of light]


Question 15 of 15


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