CBSE Physics Thermal and Chemical Effect Expected Questions for Quick Revision : Unit III
[Short and V/Short Answer Questions 1-2 marks]
1. State two factors on which temperature of inversion for a thermocouple depends.
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2. How is the electric conductivity of an electrolyte affected by increase in temperature ?
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3. Write the expression connecting the thermoelectric emf. of a thermocouple with temperature difference of its cold and hot junctions.
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4. Describe the term electrolysis. Give two factors which are responsible for lower electric conductivity of electrolytes than metals at room temperature.
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5. Current I flows through potential difference V across a conductor. What is the rate of production of heat ?
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6. Write the expression connecting thermoelectric e.m.f. for a thermocouple with temperature difference of junction ?
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7. Define the term electrochemical equivalent. What is its unit in S.I ?
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8. What is difference between Scebcck effect and Peltier effect 7
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9. What is the difference between Joule’s effect and Thomson’s effect ?
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10. Define Faraday.
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11. What is electricity consumed and cost of using 2 fans 55 watt each for 5 hours a day in September. 1 BOT costs Rs. 2.
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