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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. CBSE Board Exams. Entrance Exams. Admissions Test. Jobs Test. General Knowledge All Grades Exams

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

1. Ozone layer blocks the radiations of wave length ?

Question 1 of 15

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

Question 2 of 15

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

Question 3 of 15

4. The frequency of ϒ-rays, X-rays and ultraviolet rays are a, b and c respectively. Then ?

Question 4 of 15

5. A 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 5 of 15

6. An LCR series circuit is connected to a source of alternating current. At resonance, the applied voltage and the current flowing through the circuit will have a phase difference of ?

Question 6 of 15

7. A 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 7 of 15

8. The structure of solids is investigated by using ?

Question 8 of 15

9. Which one of the following electromagnetic radiations have the smallest wavelength ?

Question 9 of 15

10. In a circuit inductance L and capacitance C are connected as shown in figure; A1 and A2 are ammeter.s When key K is pressed to complete the circuit, then just after closing key (K) the reading of current will be ?

Question 10 of 15

11. Fro a series L C R-circuit, the power loss at wavelength ?

Question 11 of 15

12. If ε°and μ° are respectively the electric permittivity and magnetic permeability of free space, and are the corresponding quantities in a medium the index of refraction of the medium is ?

Question 12 of 15

13. Which of the following rays are not electromagnetic waves ?

Question 13 of 15

14. Which of the following is the longest wave ?

Question 14 of 15

15. The 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 15 of 15

 Test By Subject CBSE Test By Topics Alternating Current and Electromagnetic Waves