An electrical appliance is rated as $60 W - 150 V$ .
(a) What do you understand by this statement?
(b) How much current will flow through the appliance when in use?

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Solution

(a) $60 W - 150 V$ power rating of appliance means, "if appliance is put on a circuit of $150$ volt, it will consume $60 W$ electrical power i.e. electric energy consumed by it in $1$ sec is $60$ J.
(b) $P = V I$
$∴$ Current will through the appliance
$I = \frac{P}{V} = \frac{60 W}{150 V} = 0.4 A$

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An electrical appliance is rated as 60W−150V.(a) What do you understand by this statement?(b) How much current will flow through the appliance when in use?

(a) 60W−150V power rating of appliance means, "if appliance is put on a circuit of 150 volt, it will consume 60W electrical power i.e. electric energy consumed by it in 1 sec is 60 J.(b) P=VI∴ Current will through the applianceI=PV=60W150V=0.4A

An electrical appliance is rated as $60 W - 150 V$ .
(a) What do you understand by this statement?
(b) How much current will flow through the appliance when in use?