Question

Current of 5 mA is flowing in the given circuit. Find the value of the resistor \( R \).

Hint:

Subtract the diode voltage drop before applying Ohm's Law to find resistance.

Answer 1

Using Ohm's Law: \[ V_{\text{total}} = 1.5 \, V - 0.5 \, V = 1.0 \, V \] \[ I = \frac{V}{R} \] \[ 5 \times 10^{-3} = \frac{1}{R} \] \[ R = \frac{1}{5 \times 10^{-3}} = 200 \, \Omega \] \[ \boxed{200 \, \Omega} \]