Practice test

Electricity and magnetism - Test Set 1

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Transformer is used for –
    1. To increase the A.C. voltage
    2. To increase DC. Voltage
    3. To convert Electric Energy into heat energy
    4. To convert AC into DC.
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  2. Question 2

    The filament of electric bulb is made up of–
    1. Copper
    2. Nichrome
    3. Lead
    4. Tungsten
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  3. Question 3

    For the filament of electric bulb tungsten is used because–
    1. It is a conductor
    2. It is cheaper
    3. It is malleable
    4. Its melting point is very high
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  4. Question 4

    What is filled inside an electric bulb?
    1. Nitrogen
    2. Carbon dioxide
    3. Argon
    4. Oxygen
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  5. Question 5

    A fuse wire can be indentify due to the properties–
    1. High Resistivity and minimum melting point
    2. High Resistivity and high melting Point
    3. Minimum Resistivity and minimum melting point
    4. Minimum Resistivity and minimum melting point
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  6. Question 6

    An electric iron requires a ______ fuse to prevent short circuiting.
    1. 2A
    2. 5A
    3. 4A
    4. 3A
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  7. Question 7

    What is the SI unit of current?
    1. Ohm
    2. Ampere
    3. Metre
    4. Volt
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  8. Question 8

    What is the unit of specific resistance?
    1. Farad
    2. Ohm meter
    3. Coulomb
    4. Ampere
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  9. Question 9

    Before starting a 5 day and 5 night excursion, Mr. Patel provided all his students with battery powered flash lights. He also gave them some extra batteries to use as spare. Then Mr. Patel asked them whether they know how the batteries will produce electricity and help them. What do you think the correct answer to his question is?
    1. Electricity is produced by the chemicals stored in the battery.
    2. Electricity is produced by friction between the battery and the flash light.
    3. Electricity is saved in the battery from the factory that produces it.
    4. Battery extracts electricity from the environment and passes it to the flash light.
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  10. Question 10

    In electricity overloading cannot be caused by:
    1. Connecting too many appliances to a single socket.
    2. Accidental hike in the supply voltage.
    3. The live wire coming in direct contact with the neutral wire
    4. The live wire and the neutral wire coming into contact through a heavy resistance.
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  11. Question 11

    The SI unit of which fundamental physical quantity is named in the honour of Charles Augustin Coulomb?
    1. Electric field
    2. Electric current density
    3. Electric power
    4. Electric charge
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  12. Question 12

    The Greek letter "Omega" is used to represent which physical quantity in the International System of Units (SI)?
    1. Electric potential difference
    2. Electric displacement field
    3. Electrical conductance
    4. Electric resistance
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  13. Question 13

    A milliamp is a unit of measurement of electric current, which is equal to how many amps?
    1. 0.01AMP
    2. 0.001AMP
    3. 0.0001AMP
    4. 0.00001AMP
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  14. Question 14

    Why is it always emphasised NOT to touch any electric switch board with wet hands?
    1. Water can erode the switchboard.
    2. Combination of water and our body is a good conductor of electricity.
    3. Wet hands can fade away the colour coat of the switchboard.
    4. Wet hands might slip from the switch.
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  15. Question 15

    Meera shifted to a new house and was fixing light bulbs in her apartment. One of the three bulbs she fixed did not light up. Upon testing she realised it was a case of fused bulb. So, she bought a new one which then lit up perfectly. Select the correct option that describes what happened to the fused bulb.
    1. The switch for the bulb was not turned on
    2. Meera did not fix the bulb to the holder properly
    3. The filament inside it was broken
    4. There was no connection between the bulb holder and the switch
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  16. Question 16

    What is the unit of electric current?
    1. Volt
    2. Watt
    3. Ohm
    4. Ampere
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  17. Question 17

    Which of the following is used for determining the value of 1 ampere?
    1. C = A × 2 s
    2. A = 1C / s
    3. C = A / 2 s
    4. A = 2C / s
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  18. Question 18

    Identify the device used to change the resistance in an electric circuit.
    1. Voltmeter
    2. Ammeter
    3. Rheostat
    4. Conductor
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  19. Question 19

    Which of the following pairs of physicists and their contributions/ discoveries is INCORRECT?
    1. Albert Einstein - Explanation of photoelectric effect
    2. Galileo Galilei - Wave theory of light
    3. Heinrich Rudolf Hertz - Generation of electromagnetic waves
    4. Michael Faraday - Laws of electromagnetic induction
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  20. Question 20

    ______ is commonly represented by the Greek letter p (rho).
    1. Electrical conductivity
    2. Current
    3. Electrical resistivity
    4. Flow of charges
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