In the given circuit the current through Zener Diode is close to:

For the circuit shown below, the current through the Zener diode is -

To get output 1 at R, for the given logic gate circuit the input values must be

Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are reversed, the value of V₀ changes by : (assume that the Ge diode has large breakdown voltage)