Draw a circuit diagram of L.E.D. Mention it's advantages?

Draw a circuit diagram of L.E.D. What are its advantages?

Mention four advantages of S.I.?

Draw a circuit diagram for the determination of the internal resistance of a cell using potentiometer. Derive the formula to be used.

Draw a lablled circuit diagram of a Zener diode as a voltage regulator.

Draw a circuit diagram of C.E. transistor amplifier. Briefly explain its working and write the expression for (i) current gain (ii) voltage gain of the amplifier.

Draw a labelled circuit diagram of a transistor acting as a common emitter amplifier. What is meant by phase reversal?

Draw a labelled circuit diagram of a potentiometer to measure internal resistance of a cell. Write the working formula. (Derivation not required).

Draw a circuit diagram to explain the ring system of house wiring. State two advantages of it.

Draw a labelled circuit diagram of a transistor as a switch and draw its input and output graphs.

Draw a labelled circuit diagram of a potentiometer to compare emfs of two cells. Write the working formula (Derivation not required).