Question
Physics Question on Current electricity
The reading of the ammeter for a silicon diode in the given circuit is
A
0
B
15 mA
C
11.5 mA
D
13.5 mA
Answer
11.5 mA
Explanation
Solution
According to Ohm's Law, Voltage (V) = Current (I) × Resistance (R)
From the Given equation, V = 3V, R = 200 ohm, I =?
Here, across the diode potential barrier ΔV=0.7 volts
The formula will look like, I=(V−ΔV)/R
Therefore, I= (3−0.7) /200
=0.0115 A
=11.5 mA
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