Class 12

21. Heating And Chemical Effect of Current question bank (Physics)

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Q1.

One kilowatt hour is equal to  

(A)
\(36 \times 10^5 \, \text{joules}\)
(B)
\(36 \times 10^3 \, \text{joules}\)
(C)
\(10^3 \, \text{joules}\)
(D)
\(10^5 \, \text{joules}\)
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Q2.

If \( R_1 \) and \( R_2 \) are respectively the filament resistances of a 200 watt bulb and 100 watt bulb designed to operate on the same voltage, then  

(A)
\( R_1 \) is two times \( R_2 \)
(B)
\( R_2 \) is two times \( R_1 \)
(C)
\( R_2 \) is four times \( R_1 \)
(D)
\( R_1 \) is four times \( R_2 \)
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