Electrical Engineering: Circuit theory MCQ

In the circuit shown below, the switch is closed at t = 0. The value of θ in degrees which will give the maximum value of DC offset of the current at the time of switching is

The symbols, a and T, represent positive quantities, and u(t) is the unit step function. Which one of the following impulse responses is NOT the output of a causal linear time-invariant system?

For the given circuit the value of V_th is ______.

In the given circuit rms value of I₁ is _____.

To ensure the maximum power transfer across  V_th the values of R₁ and R₂ will be (Diode in figure is silicon diode)