Self Studies

Electric Curren...

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  • Question 1
    1 / -0

    What is CFL ?

  • Question 2
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    The given diagram is a torch containing cells. The torch is not glowing when the switch is ON. Now, it is opened to know the reasons. Which of the following statements are correct regarding the reasons?

    (i) Bulb of the torch is fused.
    (ii) Cells are not connected properly.
    (iii) The metal parts of the torch do not make proper contact with the cell.

  • Question 3
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    Choose the wrong option regarding miniature circuit breaker (MCB)?

  • Question 4
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    Shivam went for buying a CFL from D-mart, what safety mark he should look for?

  • Question 5
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    Which of the following circuits will the bulb glow?

  • Question 6
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    An electric bell has a resistance of 5Ω5 \Omega and requires a current of 0.25 A0.25\ A to work it. Assuming that the resistance of the bell wire is 1Ω1 \Omega per 15m15m and that the bell push is 90m90m distance from the bell. How many cells each of emf 1.4V1.4V and internal resistance 2Ω2 \Omega, will be required to work the circuit.

  • Question 7
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    ___________ is used to measure electric resistance in a circuit.

  • Question 8
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    When a switch is in OFF position,
    i) Circuit starting from the positive terminal of the cell stops at the switch.
    ii) Circuit is open.
    iii) No current flows through it.
    iv) Current flows after some time.
    Choose the combination of correct answer from the following.

  • Question 9
    1 / -0

    The purpose of armature in an electric bell is

  • Question 10
    1 / -0

    If the switch is connected to a bulb and the battery is kept in the on position what do you observe?

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