An incandescent lamp is marked 40W, 240V. If resistance at room temperature (26 C) is 120 &ohm; and temperature coefficient of resistance is 4.5 10

An incandescent lamp is marked 40W, 240V. If resistance at room temper

1.	An incandescent lamp is marked 40W, 240V. If resistance at room temperature (26 C) is 120 &ohm; and temperature coefficient of resistance is 4.5 10
A.	1171
B.	2471
C.	1417
D.	All of the above
Answer» C. 1417

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An incandescent lamp is marked 40W, 240V. If resistance at room temperature (26 C) is 120 &ohm; and temperature coefficient of resistance is 4.5 10 3/ C , then its ON state filament temperature in C is approximately ___________.

An incandescent lamp is marked 40W, 240V. If resistance at room temperature (26 C) is 120 &ohm; and temperature coefficient of resistance is 4.5 10

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