Practice test

Electricity and magnetism - Test Set 2

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

    Coulomb's law is applicable for ______.
    1. Both distributed charges and point charges
    2. Between two point charges
    3. Neither point charges nor distributed charges
    4. Between two distributed charges
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  2. Question 2

    Which physicist was famous for the gold foil experiment?
    1. John Dalton
    2. JJ Thomson
    3. Niels Bohr
    4. Ernest Rutherford
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  3. Question 3

    Four resistors of equal resistance R each are connected in various possible ways both in series and/or parallel to get different combined resistances. Which of the following values of resistance cannot be achieved by using all the four resistors?
    1. 0.25 R
    2. 1.33 R
    3. 2 R
    4. 2.5 R
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  4. Question 4

    If four resistances of 4 ohm each are connected in parallel, what will be their effective resistance?
    1. 10 ohm
    2. 16 ohm
    3. 4 ohm
    4. 1 ohm
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  5. Question 5

    In an electrical circuit, the ammeter reading decreases to ______ when the length of the wire is doubled.
    1. one-third
    2. one-fourth
    3. one-sixth
    4. one-half
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  6. Question 6

    If a wire of Resistance ‘R’ is melted and recast to half of its Length, then the new resistance of the wire will be—
    1. R/4
    2. R/2
    3. R
    4. 2R
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  7. Question 7

    During electro refining, Pure Metal is collected at—
    1. Anode
    2. Cathode
    3. Container
    4. Electrolyte
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  8. Question 8

    Which of the following is an electrolytic conductor:
    1. Iron
    2. Gas carbon
    3. Copper Sulphate
    4. Mercury
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  9. Question 9

    Which of the following is best conductor of electricity?
    1. Copper
    2. Iron
    3. Aluminium
    4. Silver
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  10. Question 10

    During the conduction of current, conductor becomes—
    1. Positively charged
    2. Negatively charged
    3. Electrically neutral
    4. Alternatively positively and negatively charged
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  11. Question 11

    Current carrying conductor is related to -
    1. Magnetic Field
    2. Electric Field
    3. Electro Magnetic Field
    4. Electrostatic Field
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  12. Question 12

    A Conducting wire is -
    1. Positively Charged
    2. Negatively Charged
    3. Neutral
    4. Charged depending upon the power of current
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  13. Question 13

    The process of connecting of wires is called -
    1. Catenation
    2. Combination
    3. Cohesion
    4. Addition
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  14. Question 14

    In the resistance color code, the fourth band signifies-
    1. Tolerance level
    2. Power of ten
    3. Total value to resistance
    4. The material of the resistor
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  15. Question 15

    A piece of wire having Resistance 'R' is cut into 'n' equal parts and then connected into parallel combination what will be the effective Resistance of combination?
    1. nR
    2. R/n
    3. n³/R
    4. R/n²
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  16. Question 16

    Water should not be used to extinguish fire caused by electricity, because -
    1. It may cause electrocution
    2. It may cause dissociation of water
    3. It may cause electric dissociation
    4. Fault may occour in wires
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  17. Question 17

    Metal used for the manufacturing of Lightning conductor is -
    1. Iron
    2. Aluminium
    3. Copper
    4. Zinc
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  18. Question 18

    When two semiconductors of P and N type are brought in contact, they form p-n Junction which acts like a/an-
    1. Conductor
    2. Rectifier
    3. Amplifier
    4. Oscillator
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  19. Question 19

    Which of the following statements is incorrect regarding the resistance of a wire?
    1. It depends upon the material of wire
    2. It is proportional to the length of wire
    3. It is proportional to the area of cross-section of wire
    4. On increasing temperature resistance of metal wire increases
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  20. Question 20

    We can find with the help of Galvanometer –
    1. Resistance
    2. Energy
    3. Current
    4. Temperature
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