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
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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. The structure of solids is investigated by using ?

Question 1 of 15

2. 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 2 of 15

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

Question 3 of 15

4. The time constant of C-R circuit is ?

Question 4 of 15

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

Question 5 of 15

6. In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45°. The value of C is ?

Question 6 of 15

7. The oscillating electric and magnetic field vectors of electromagnetic wave are oriented along ?

Question 7 of 15

8. 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 8 of 15

9. 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 9 of 15

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

Question 10 of 15

11. The 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. 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 12 of 15

13. What is the value of inductance L for which the current is maximum in series LCR circuit with C = 10 μF and ω = 1000 s-1 ?

Question 13 of 15

14. What is the cause of "Green house effect" ?

Question 14 of 15

15. If λv, λx and λm represent the wavelengths of visible light, X rays and microwave respectively, then ?

Question 15 of 15


 

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