Question

If a steam engine delivers $6.0\times {10}^8$ of work per minute and absorbs $5.4\times {10}^9$ of heat per minute from its boiler then the efficiency of the engine is:

• A. 11%
• B. 12%
• C. 13%
• D. 14%

Answer 1

Answer: (A)

11%

Given,

$W=6.0\times {10}^{8}perminute$

$Q_1=5.4\times {10}^{9}perminute$

Efficiency of the engine,

$\eta =\frac{Output}{Inpute}\times 100$%

$\eta =\frac{W}{Q_1}\times 100$%

$\eta =\frac{6.0\times {10}^8}{5.4\times {10}^9}\times 100$%

$\eta =11$%

The efficiency of the engine is $11$%.

The correct option is A.