Introduction: This set
covers the heating effect of electric current, Joule's law, electric power, and
practical applications. These MCQs are important for understanding how
electrical energy converts to heat and the working of appliances as per NCERT
Class 10 Physics.
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📘 Science
PHYSICS | Electricity-E
📝 Questions: 50
⏱️ Timer: 20 min
Q1. Joule's law applies to:
Q2. In a parallel circuit, total current is high because:
Q3. If one branch in a parallel circuit breaks, the remaining circuit:
Q4. Joule's law is used in calculations when:
Q5. Using Ohm's law, heat produced can be written as:
Q6. For three resistors in parallel, the relation between currents is:
Q7. In a purely resistive circuit, electrical energy is converted entirely into:
Q8. In a parallel circuit, resistors are connected:
Q9. In parallel circuits, equivalent resistance decreases because:
Q10. Electric irons work on the principle of:
Q11. According to Joule's law, heat produced is proportional to:
Q12. Joule's law of heating states that heat produced is proportional to:
Q13. The expression H = I²Rt shows heat depends on:
Q14. Heat produced in a resistor in time t is:
Q15. The unit of heat energy produced is:
Q16. In series circuit, power consumed by each resistor depends on:
Q17. In heating devices, electrical energy is mainly converted into:
Q18. One major disadvantage of series circuit is:
Q19. In a parallel circuit, the total current is equal to:
Q20. Parallel circuits are safer for homes because:
Q21. In household wiring, appliances are connected in:
Q22. Current through 30Ω resistor connected to 12V is:
Q23. Parallel circuits are preferred because they provide:
Q24. Heating effect is used in:
Q25. Heat produced increases when resistance is:
Q26. Joule's law is valid only when current is:
Q27. In parallel circuit, power consumed depends on:
Q28. The power supplied to a circuit is given by:
Q29. Heating effect of current is an example of conversion of:
Q30. In a parallel circuit, current through each resistor depends on:
Q31. Electric fan mainly uses electrical energy to produce:
Q32. Heating effect of electric current is due to:
Q33. Fairy lights are difficult to repair because they are connected in:
Q34. Heating effect increases when current:
Q35. Total current in the above parallel circuit is:
Q36. The source keeps supplying energy to maintain current because:
Q37. Energy supplied by a source in time t is:
Q38. High resistance in heating elements is required to:
Q39. Heat produced in a resistor for steady current I in time t is:
Q40. Tungsten is used because it has a melting point of about:
Q41. Heating effect is useful in:
Q42. The work done in moving a charge Q through a potential difference V is:
Q43. Joule's law explains conversion of:
Q44. Most of the power consumed by a bulb appears as:
Q45. Energy supplied by the source in time t is:
Q46. Heat produced when current flows through a resistor depends on:
Q47. SI unit of electric power is:
Q48. Power input to an electric circuit is given by:
Q49. Rate at which energy is delivered by a current is:
Q50. Heating effect increases when current:
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