All dimensions of a rod doubled, same temperature difference: new rate of heat flow

1. A.
   $H_2 = 4H_1$
2. B.
   $H_2 = 2H_1$
3. C.
   $H_2 = \frac{H_1}{2}$
4. D.
   $H_2 = \frac{H_1}{4}$

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1. A.
   $4Q$
2. B.
   $2Q$
3. C.
   $\frac{Q}{2}$
4. D.
   $\frac{Q}{4}$

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1. A.
   $\dfrac{H_1}{2}$
2. B.
   $4H_1$
3. C.
   $2H_1$
4. D.
   $\dfrac{H_1}{4}$

Tap an option to check your answer.