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10th Standard Science - Electricity Model Question Paper Sep-30 , 2019

Electricity

10th Standard Science - Electricity Model Question Paper

Electricity Model Question Paper

10th Standard

    Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 50
    5 x 1 = 5

  1. Which of the following is correct?

    (a)

    Rate of change of charge is electrical power

    (b)

    Rate of change of charge is current.

    (c)

    Rate of change of energy is current.

    (d)

    Rate of change of current is charge.

  2. Kilowatt hour is the unit of

    (a)

    resistivity

    (b)

    conductivity

    (c)

    electrical energy

    (d)

    electrical power

  3. The S1 unit of power is

    (a)

    joule

    (b)

    ampere

    (c)

    Watt

    (d)

    ohm

  4. The resistance of material depends on.

    (a)

    Temperature

    (b)

    Length of conductor

    (c)

    Area of cross-section

    (d)

    All the above

  5. The resistance of a conductor directly proportional to

    (a)

     Length

    (b)

    Area

    (c)

    Volt

    (d)

    Current

    6. 4 x 1 = 4

  6. When a circuit is open, _____________ cannot pass through it.

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    current

  7. The power of an electric device is a product of _________ and __________.

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    voltage, current

  8. LED stands for _________.

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    Light Emitting Diode

  9. SI unit of current is __________

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    ampere

    10. 5 x 1 = 5

  10. electric current

    11. (1)

    ampere

  11. specific resistance

    12. (2)

  12. electrical energy

    13. (3)

    \(\frac{W}{Q}\)

  13. Potential difference

    14. (4)

    joule

  14. Diode

    15. (5)

    ohmmeter
    2 x 2 = 4

  15. Assertion: In a simple battery circuit the point of highest potential is the positive terminal of the battery.
    Reason: The current flows towards the point of the highest potential.
    a) If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
    b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
    c) If the assertion is true, but the reason is false.
    d) If the assertion is false, but the reason is true.

  16. Assertion: In a simple battery, the point of lowest potential is +ve terminal of the battery.
    Reason: The current flows to higher potential as to lower potential.
    Codes:
    a) If both the assertion and the reason are true and the reason is the correct explanation of the assertion
    b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
    c) If the assertion is true, but the reason is false.
    d) If the assertion is false but the reason is true.

    17. 5 x 2 = 10

  17. Define the unit of current.

  18. What happens to the resistance, as the conductor is made thicker?

  19. Name any two devices, which are working on the heating effect of the electric current.

  20. What is the difference between open and closed circuits?

  21. Give the formula for the following
    (i) Ohm's law
    (ii) Joules law 
    (iii) Effective resistance for resistance in series
    (iv) Power
    (v) Specific resistance

    22. 2 x 4 = 8

  22. Define electric potential and potential difference.

  23. State Ohm’s law.

    24. 1 x 7 = 7

  24. a) What are the advantages of LED TV over the normal TV?
    b) List the merits of LED bulb.

    25. 1 x 7 = 7

  25. In the circuit diagram given below, three resistors R1, R2 and R3 of 5 Ω, 10 Ω and 20 Ω respectively are connected as shown. Calculate:

    A) Current through each resistor
    B) Total current in the circuit
    C) Total resistance in the circuit

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