1. The first letter of a Java variable is lower case.
2. Each successive word in Java variable begins with a capital letter.
3. All other letters are lower case.
4. A Java variable can have a digit as first character.

Assertion (A): In a series resonant circuit current is maximum at resonance.

Reason (R): The inductive and capacitive reactances are equal.

1. H(s) cannot have a pole at s = 0
2. H(s) cannot have a pole at s = ± j4
3. H(s) cannot have a pole at s = ∞
4. H(s) cannot have a pole at s = + 2

1. In BPSK we deal individually with each bit of duration T_b
2. In QPSK we lump two bits to form a symbol
3. In both BPSK and QPSK signal changes occur at bit rate
4. In QPSK the symbol can have any one of four possible values

Assertion (A): TWT uses a focussing mechanism to prevent the electron beam from spreading.

Reason (R): In a TWT the electron beam has to travel a much longer distance than in klystron.

1. mismatch between FET parameters
2. difference in values of resistances used in circuit
3. variation in supply voltage.

Assertion (A): A JFET behaves as a resistor when V_GS < V_P.

Reason (R): When V_GS < V_P, the drain current in a JFET is almost constant.