Q. For 7805 ic regulator, the input voltage is 15 V, and required output current is 0.8A. Calculate the appropriate heat sink size.

A
16 W
B
12 W
C
8 W
D
4 W
Solution:

Heat generated = (input voltage ?) x output current

(15 ?) x 0.8 = 10?0.8 = 8W

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