Question

important question !!

class X

1. The cost of production of electricity in thermal power station in Bihar is lesser than in Gujarat. Prove this statement by giving reasons.
2. Out of two solar cookers, one was covered and the other one was left open. Which one of the two will be more efficient and why?
3. The surface area of concentrator type solar heater is 5m2. It can reflect 80% of solar radiation incident while it absorbs the rest. Calculate energy concentrated by heaters as it focus in 2 hours if solar energy was delivered to it at the rate of 0.4 kJ/m2s


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Answer 1

$\huge \bf{ \green Y \red o \blue u \purple r \red A \blue n \pink s \red w \green e \pink r \green..}$

✏️✏️.The cost of production of electricity in a thermal power station in Bihar is lesser than in Gujarat.

1. Because in Bihar coal is available and in Gujarat it is transported from Bihar.

2. It could be costly in Gujarat because it is transported in Gujarat and is cheap in Bihar because it is easily available there.

✏️✏️.The solar cooker which is covered is more efficient because it can trap the heat and don't let it go outside.

.....✏️

✏️✏️.

$\huge \bf{ \red Energy \: Concentrated}$

$( \frac{80}{100} )(0.66k \: W/m²)(5m2)$

$(1 \times 60 \times 60S) = 950 \:4kJ \:$