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12th Standard English Medium Physics Subject Current Electricity Book Back 1 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Physics

Time : 00:30:00 Hrs
Total Marks : 5

    Part I

    5 x 1 = 5
  1. The following graph shows current versus voltage values of some unknown conductor. What is the resistance of this conductor?

    (a)

    2 ohm

    (b)

    4 ohm

    (c)

    8 ohm

    (d)

    1 ohm

  2. A toaster operating at 240 V has a resistance of 120 Ω. The power is ______.

    (a)

    400 W

    (b)

    2 W

    (c)

    480 W

    (d)

    240 W

  3. What is the value of resistance of the following resistor?

    (a)

    100 k Ω

    (b)

    10 k Ω

    (c)

    1 k Ω

    (d)

    1000 k Ω

  4. A wire connected to a power supply of 230 V has power dissipation P1. Suppose the wire is cut into two equal pieces and connected parallel to the same power supply. In this case power dissipation is P2. The ratio \(\frac{P_2}{P_1}\) is ______.

    (a)

    1

    (b)

    2

    (c)

    3

    (d)

    4

  5. In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW are connected. The voltage of electric mains is 220 V. The maximum capacity of the main fuse of the building will be ______.

    (a)

    14 A

    (b)

    8 A

    (c)

    10 A

    (d)

    12 A

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