Term 2 Electric Charge and Electric Current Three Marks Questions

9th Standard

    Reg.No. :
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Science

Time : 00:40:00 Hrs
Total Marks : 27
    9 x 3 = 27
  1. State Ohm’s law.

  2. On what factor does the resistance of a wire depend at a particular temperature?

  3. Name any two appliances which work under the principle of heating effect of current.

  4. Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5A.

  5. The values of current I flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?

    I (ampere) 0.5 1.0 2.0 3.0 4.0
    V (volt) 1.6 3.4 6.7 10.2 13.2

    [Hint: plot V-I a graph and take slope]

     

  6. How many electrons will be there in one coulomb of charge?

  7. Suppose, 25 C of charge is determined to pass through a wire of any cross section in 50 s, what is the measure of current?

  8. The current flowing through a lamp is 0.2A. If the lamp is switched on for one hour, What is the total electric charge that passes through the lamp?

  9. The e.m.f of a cell is 1.5V. What is the energy provided by the cell to drive 0.5 C of charge around the circuit?

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