Practice test

Electricity and magnetism - Test Set 6

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

    The cause of magnetism in materials is -
    1. Electrons at rest
    2. Protons at rest
    3. All stationary neutrons
    4. Circular motion of electrons.
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  2. Question 2

    Uniform magnetic field is represented by -
    1. Closed curves
    2. Parallel lines
    3. Convergent lines
    4. Divergent lines
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  3. Question 3

    What is the unit of electrical conductivity?
    1. Ohm
    2. Ohm-cu
    3. Mho
    4. Ohm/cu
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  4. Question 4

    Who discovered the link between electricity and magnetism?
    1. Maxwell
    2. Diesel
    3. Michael Faraday
    4. Volta
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  5. Question 5

    Tesla is the unit of Magnetic field -
    1. Induction
    2. Moment
    3. Area
    4. Flow
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  6. Question 6

    Resistance of a conductor increases on -
    1. Increasing Length
    2. Decreasing area of cross-section
    3. Increasing temperature
    4. All of these
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  7. Question 7

    Which of the following rated electric bulb?
    1. Power and current
    2. Power and voltage
    3. Current and voltage
    4. Energy and current
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  8. Question 8

    Chemical Energy is converted into Electric Energy-
    1. Dynamo
    2. Electric Fan
    3. Battery
    4. Atom Bomb
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  9. Question 9

    Certain Substances looses their electrical resistance completely at super low temperature such substances are called -
    1. Super conductor
    2. Semi conductor
    3. Dielectric
    4. Perfect conductor
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  10. Question 10

    The substance having infinite electric resistance are called -
    1. Conductor
    2. Insulator
    3. Resistor
    4. Electrolyte
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  11. Question 11

    What is the conductivity of super conductor?
    1. Zero
    2. Infinite
    3. Less
    4. More
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  12. Question 12

    What is the resistance of an ideal voltmeter?
    1. Infinite
    2. Zero
    3. High
    4. Low
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  13. Question 13

    Magnetic keeper are the pieces of—
    1. Nickel
    2. Cobalt
    3. Iron
    4. Soft Iron
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  14. Question 14

    Device used to convert A.C. into D.C. known as—
    1. Dynamo
    2. Inductive coil
    3. Generator
    4. Rectifier
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  15. Question 15

    The Solids which conducts the electricity at high temperature but not at low temperature are called—
    1. Super conductor
    2. Semiconductor
    3. Metallic conductor
    4. Insulator
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  16. Question 16

    Which of the following is a conductor of electricity?
    1. Rubber
    2. Pure water
    3. Salt water
    4. Benzene
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  17. Question 17

    The metal used in wires at domestic Level—
    1. Nickel
    2. Aluminium
    3. Iron
    4. Copper
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  18. Question 18

    Fuse wire used as a safety device in domestic electrical appliances is made up of metal having—
    1. Low resistance
    2. Low melting point
    3. Low conductivity
    4. Low specific gravity
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  19. Question 19

    For which of the following ohm’s law is correctly applicable?
    1. Insulator
    2. Semi conductor
    3. Conductor
    4. Super conductor
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  20. Question 20

    When number of turns in a coil are made thrice without any change in the length of coil, then what will be its self inductance?
    1. Three times
    2. Nine times
    3. Six times
    4. One-third
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