Assertion (A): In a parallel circuit having two branches, each branch current may be more than source current.

Reason (R): Calculations in ac circuits use rules of complex algebra.

1. An arithmetic operation between integer and an integer gives integer as the result.
2. An arithmetic operation between a real and a real constant gives real constant as the result.
3. An arithmetic operation between an integer constant and a real constant is not valid.

Match the following:

Assertion (A): The output voltage of an inverter can be controlled by PWM technique

Reason (R): In a current source inverter the input current is constant.

1. B = 0
2. μ_r is high
3. diamagnetism is high
4. transition temperature varies with isotopic mass.

Assertion (A): For most metals, Fermi energy E_F is less than 10 eV.

Reason (R): Fermi level of a metal is given by E_F = 3.64 x 10^-19 (n)^2/3 where n is number of free electrons/m³ of metal.