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    Physics problem

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    The overhead cable supplying an outbuilding from the 230V supply has a resistance of 0.9 ohms. A2kw radiator and a 1500w kettle both rated at 230v are in use at the same time. DETERMINE THE VOLTAGE AT THE TERMINALS OF THIS APPARATUS. What WOULD BE THE VOLTAGE IF A 750w; 240Vwater heater was also switched on?

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    The equivalent resistance of the 2 devices in parallel is:

    Req = 230^2/(2000+1500) = 15.11 ohms.

    Using voltage divider, the ...

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