CBSE Physics Alternating Current And Electromagnetic Waves Test Online Mcqs
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CBSE Physics Alternating Current and Electromagnetic Waves Test Online

Test Name Alternating Current and Electromagnetic Waves Test
Subject CBSE Physics
Test Type MCQs
Total Question 30
Total Marks 60
Total Time 30 Minutes
Test Help For
  • CBSE Physics.
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Central Board of Secondary Education, CBSE is a Central Board of Education in India for public and private schools. They facilitates all exams from Grade 1st to 12th. Physics subject is basic part of there syllabus. Our topics is Alternating Current and Electromagnetic Waves for preparation all types of exams test. Alternating Current Circuits and Electromagnetic Waves can be produced using a device called an alternator. This device is a special type of electrical generator designed to produce alternating current. A loop of wire is spun inside of a magnetic field, which induces a current along the wire. Pick test and start your preparation through best choices questions and answers.

CBSE Physics Alternating Current and Electromagnetic Waves Test Online

CBSE

1. mark reviewIn an AC circuit, the rms value of current, ims is related to the peak current, iº by the relation ?

Question 1 of 15

2. mark reviewA step-up transformer operates on a 230 V line and supplies current of 2 A to a load. The ratio of the primary and secondary windings is 1 : 25. The current in the primary coil is ?

Question 2 of 15

3. mark reviewWhich of the following is the longest wave ?

Question 3 of 15

4. mark reviewWhat is the cause of "Green house effect" ?

Question 4 of 15

5. mark reviewFro a series L C R-circuit, the power loss at wavelength ?

Question 5 of 15

6. mark reviewA coil of inductive reactance 31 Ω has a resistance of 8Ω. It is placed in series with a condenser of capacitive reactance 25Ω. The combination is connected to an AC source of 110V. The power factor of the circuit is ?

Question 6 of 15

7. mark reviewA signal emitted by an antenna form a certain point can be received at another point of the surface in the form of ?

Question 7 of 15

8. mark reviewThe primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an AC supply of 20 V-50Hz. The secondary will have an output of ?

Question 8 of 15

9. mark reviewA wire of resistance R is connected in series with an inductor of reactance L. Then quality factor of RL circuit is ?

Question 9 of 15

10. mark reviewWhich one of the following electromagnetic radiations have the smallest wavelength ?

Question 10 of 15

11. mark reviewThe primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux Φ linked with the primary coil is given by Φ = Φ + 4t, where Φ is in Weber, t is time in second and Φ is a constant, the output voltage across the secondary coil is ?

Question 11 of 15

12. mark reviewIn an AC circuit with voltage V and current i the power dissipated is ?

Question 12 of 15

13. mark reviewThe frequency of ϒ-rays, X-rays and ultraviolet rays are a, b and c respectively. Then ?

Question 13 of 15

14. mark reviewThe reactance of a capacitor of capacitance C is X. If both the frequency and capacitance be doubled, the new reactance will be ?

Question 14 of 15

15. mark reviewThe electromagnetic radiations are caused by ?

Question 15 of 15


 

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