For an insulator, the forbidden energy gap is

In the circuit shown assume the diode to be ideal. When V_i increases from $$-$$2V to 6V, the change in current is (in mA)

In the following circuit the equivalent resistance between X and Y is ......... $$\Omega$$

A transistor is connected in common-emitter (CE) configuration. The collector supply is 8V and the voltage drop across a resistor is 500 $$\Omega$$ in the collector circuit is 0.6 V. IF the current gain factor $$\alpha$$ is 0.96, find the base current