50. By which of the following laws is production of heat due to current related? 51. Consider two electric bulbs rated for the same voltage having powers of 100W and 200W. If R1 an... 50. By which of the following laws is production of heat due to current related? 51. Consider two electric bulbs rated for the same voltage having powers of 100W and 200W. If R1 and R2 be their resistances respectively, then: 52. Which among the following relations is incorrect? 53. When a load is switched off, sparking occurs because of high __________ of the circuit. 54. For what purpose are voltage dependent resistors used?
Understand the Problem
The questions are addressing concepts in electrical laws and principles, including Joule's law, resistance, power formulas, and circuit behavior. They involve selecting correct statements or relationships related to these concepts.
Answer
50: Joule's law, 51: R2 = 2R1, 52: P = V/R², 53: Inductance, 54: Suppress surges
50: Joule's law (c), 51: R2 = 2R1 (b), 52: P = V/R² (b), 53: Inductance (d), 54: To suppress surges (a)
Answer for screen readers
50: Joule's law (c), 51: R2 = 2R1 (b), 52: P = V/R² (b), 53: Inductance (d), 54: To suppress surges (a)
More Information
The production of heat in a conductor due to electric current follows Joule's law, where heat is proportional to the square of the current, time, and resistance.
Tips
Common mistake is to confuse these laws with Ohm's law, which relates voltage, current, and resistance but not heat.
Sources
- Two electric bulbs, rated the same voltage - Doubtnut - doubtnut.com
- Two electric bulbs explanation - Toppr - toppr.com
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