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GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V

28-JUL-2016 10:12

    GK Questions with answers on Science Physics (Magnetic field of electric Current) Set V ,in this set you will find repository of 10 Objective Type Questions that will help you to attune and equipped for different competitive examinations like UPSC-prelims, IAS-prelims, NDA, CDS, SSC, State Services etc as well as academic examinations.

    1. If the current reverses direction after equal intervals of time, it is called:

    A. Direct current

    B. Alternating current

    C. Induced current

    D. Ionic current

    Ans: B

    2. At what time interval does the alternating current produced in India reverse its direction?

    A. 1/100 second

    B. 5 seconds

    C. 1 minute

    D. 5 minutes

    Ans: A

    3. Which of the following are the sources for producing alternating current?

    A. Power house generators

    B. Bicycle dynamos

    C. Car alternators

    D. All of the above

    Ans: D

    4. Which of the following convert’s mechanical energy into electrical energy?

    A. Refrigerator

    B. Fan

    C. Electric motor

    D. Electric generator

    Ans: D

    5. What is the frequency of alternating current produced in India?

    A. 15 Hz

    B. 50 Hz

    C. 55 Hz

    D. 65 Hz

    Ans: B

    6. In generators, the voltage produced can be increased by:

    A. Coil with more turns

    B. Rotating coil faster

    C. Using coil with larger area

    D. All of the above

    Ans: D

    7. Which of the following parts of the generators is stationary to produce electricity in large powerhouses?

    A. Coil

    B. Electromagnet

    C. Slip rings

    D. Carbon brush

    Ans: A

    8. Which of the following parts is not there in A.C. generator?

    A. Slip rings

    B. Coil

    C. Commutator

    D. Galvanometer

    Ans: C

    9. Where do we use transformers?

    A. Power stations

    B. Radio sets

    C. Television

    D. All of the above

    Ans: D

    10. How much electric potential does the live wire carry?

    A. 100 volts

    B. 150 volts

    C. 185 volts

    D. 20 volts

    Ans: D

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