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प्रश्न
A direct current of 4 A and an alternating current of peak value 4 A flow through resistance of 3Ω and 2Ω respectively. The ratio of heat produced in the two resistances in same interval of time will be ______.
पर्याय
3 : 2
3 : 1
3 : 4
4 : 3
MCQ
रिकाम्या जागा भरा
उत्तर
A direct current of 4 A and an alternating current of peak value 4 A flow through resistance of 3Ω and 2Ω respectively. The ratio of heat produced in the two resistances in same interval of time will be 3 : 1.
Explanation:
As H = `"i"_"rms"^2`Rt
H ∝ `"i"_"rms"^2`R
`"H"_1/"H"_2= (("i"_("rms"_1))/("i"_("rms"_2)))^2xx"R"_1/"R"_2`
= `(4/(4/sqrt2))^2xx3/2`
= `2xx3/2`
= `3/1`
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