MCQOPTIONS
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MCQOPTIONS
| 1. |
The rate of conduction heat flow in case of a composite sphere is given by |
| A. | Q = t<sub>1 </sub>– t<sub>2</sub>/ (r<sub>2</sub> – r<sub>1</sub>)/4πk<sub>1</sub>r<sub>1</sub>r<sub>2 </sub>+<sub> </sub>(r<sub>3</sub> – r<sub>2</sub> )/4πk<sub>2</sub>r<sub>2</sub>r<sub>3</sub> |
| B. | Q = t<sub>1 </sub>– t<sub>2</sub>/ (r<sub>2</sub> – r<sub>1</sub>)/4πk<sub>1</sub>r<sub>1</sub>r<sub>2 </sub>+<sub> </sub>(r<sub>3</sub> – r<sub>2</sub> )/4πk<sub>2</sub>r<sub>2</sub>r<sub>3</sub> |
| C. | Q = t<sub>1 </sub>– t<sub>2</sub>/ (r<sub>2</sub> – r<sub>1</sub>)/4πk<sub>1</sub>r<sub>1</sub>r<sub>2 </sub>+<sub> </sub>(r<sub>3</sub> – r<sub>2</sub> )/4πk<sub>2</sub>r<sub>2</sub>r<sub>3</sub> |
| D. | Q = t<sub>1 </sub>– t<sub>2</sub>/ (r<sub>2</sub> – r<sub>1</sub>)/4πk<sub>1</sub>r<sub>1</sub>r<sub>2 </sub>+<sub> </sub>(r<sub>3</sub> – r<sub>2</sub> )/4πk<sub>2</sub>r<sub>2</sub>r<sub>3</sub> |
| Answer» D. Q = t<sub>1 </sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® t<sub>2</sub>/ (r<sub>2</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® r<sub>1</sub>)/4‚âà√¨‚àö√ëk<sub>1</sub>r<sub>1</sub>r<sub>2 </sub>+<sub> </sub>(r<sub>3</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® r<sub>2</sub> )/4‚âà√¨‚àö√ëk<sub>2</sub>r<sub>2</sub>r<sub>3</sub> | |