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relay resistance

Discussion in 'General Electronics Discussion' started by paulb89, Dec 2, 2015.

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  1. paulb89

    paulb89

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    Dec 2, 2015
    Hi can anyone help me solve this question and explain how they got the answer?

    Cheers
     

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  2. paulb89

    paulb89

    2
    0
    Dec 2, 2015
    Thank you ! Most appreciated
     
  3. jedro

    jedro

    2
    0
    Dec 1, 2014
    Think about if first for a second. A given is the 275 ohms across the contacts of the relay.

    If you add another path for current to flow then it should be intuitive that the total resistance will drop. That is, it will be less.

    Of the four answers provided, one is the given resistance, one is lower than the given resistance and the other two are more than the given resistance.

    So with this known, which is the correct answer of the four?

    But now if there were two answers that were less than the given resistance you would have to do the math.
     
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