WebElectrons flow in a wire when there is a potential difference across its ends The unit of electrical resistance is the ohm If two copper wires of the same length have different thickness, then the thicker wire has less resistance Heat a copper wire and its electric resistance increases Two light bulbs are connected to a battery, one at a time. WebApr 6, 2024 · Whenever an electric current gets passed through the conductor, it tends to generate heat because of the hindrance that is caused due to the conductor to the current …
Electrochemical reaction Definition, Process, Types, Examples ...
WebSep 2, 2024 · Heat produced will increase by four times (H ∝ I 2) Question 7. Name some devices which work on heating effect of electric current. Answer: Electric bulb; Electric iron; Electric geyser; Electric fuse; Question 8. Why is an electric bulb filled with argon and nitrogen gas? Answer: An electric bulb is filled with argon and nitrogen gas because ... WebMar 24, 2024 · You can see there's a close link between how much heat energy something has and its temperature. So are heat energy and temperature just the same thing? No! Let's get this clear: Heat is the … irt services
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WebNov 25, 2024 · Electricity Class 10 MCQ Question 1. A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to, (a) ρ (b) (c) 2 ρ (d) 4 ρ Answer/Explanation 2. The temperature of a conductor is increased. The graph best showing the variation of its resistance is Answer/Explanation 3. WebApr 6, 2024 · The same current flowing through the tungsten filament of an electric bulb produces enormous heat but almost negligible heat is produced in the connecting wires of copper. This is because the fine tungsten filament has very high resistance whereas copper connecting wires have very low resistance. WebHere V is constant (220V) I=V/P (ohm's law) P= (V^2)/R. (so far the same as @Prithvi Sriram mentioned, but here's the shortcut) if v is constant v^2 will also be constant. P is inversely proportional to R. if P increases, R decreases. that is why the 2nd bulb offers more resistance. remember---only if V is constant. portal opening today 3/23/23