Q7 of 46 Page 268

What is the major fuel used in thermal power plants?

Thermal power plants generally use fossil fuels as their major fuel to produce heat by burning them few examples are petroleum, coal, charcoal. But the majorly used in industries is coal.


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5

The atomic number of natural radioactive element is _________.

 6

Which one of the following statements does not represents Ohm’s law?

(i) current / potential difference = constant


(ii) potential difference / current = constant


(iii) current = resistance x potential difference

 8

Which is the ultimate source of energy?

 9

What must be the minimum speed of wind to harness wind energy by turbines?