Q. The cut in voltage

View solution

Q. With an ac input from 50 Hz power line, the ripple frequency is

View solution

Q. For an insulating material, dielectric strength and dielectric loss should be respectively

View solution

Q. Semiconductors have

View solution

Q. The I/P impedance (Zi) and the O/P impedance (Zo) of an ideal trans conductance (Voltage controlled current source) amplifier are

View solution

Q. The relation between thermionic emission current and temperature is known as

View solution

Q. Assertion (A): When forward biased a p-n junction has low resistance.

Reason (R): The ratio dv/di is called dynamic resistance.

View solution

Q. Assertion (A): JFET is a voltage controlled device.

Reason (R): The drain current can be controlled by controlling VGS.

View solution

Q. For a P-N junction diode, the current in reverse bias may be

View solution

Q. An amplifier with resistive -ve feedback has two left poles in its open loop transfer function. The amplifier

View solution

Q. Amplification of ultrasonic waves is possible in a piezoelectric semiconductor under applied electric field. The basic phenomenon involved is known as

View solution

Q. For a junction FET in the pinch off region, as the drain voltage is increased, the drain current

View solution

Q. For a BJT, under the saturation region.

View solution

Q. In which mode of BJT operation are both junctions reverse biased?

View solution

Q. In a bipolar transistor, the emitter base junction has

View solution

Q. Which of these has semi-conductor metal junction?

View solution

Q. The ripple factor of power supply is a measure of

View solution

Q. The product kT (where k is Boltzmann's constant and T is absolute temperature) at room temperature is about

View solution

Q. If E is energy level of electron and EF is fermi level, and T = 0 and E > EF, then

View solution

Q. Which variety of copper has the best conductivity?

View solution