In the linear regulator circuit shown, the base to emitter voltage $V_{B E}$ of the BJT is 0.6 V . The Zener diode clamps the base voltage to 5.4 V . Ignore the biasing current of the Zener diode and BJT. The maximum possible efficiency of the regulator circuit is

$\_\_\_\_$ % (Round off to one decimal place)

$$ \text { In the circuit shown, the open loop gain of the operational amplifier is } A_0=105 \text {. } $$

$$ \text { What is the voltage gain of the circuit? (Round off to two decimal places) } $$

The Laplace transform of the step response of a system is given by

$$ Y(s)=\frac{100}{s(s+100)} $$

The rise time is defined as the time taken for the response to go from 0.1 to 0.9 of its final value. The settling time is defined as the time taken for the response to reach 0.98 of its final value.

For this system, the rise time ( $T_r$ ), settling time ( $T_s$ ), and time constant ( $T_c$ ), all expressed in seconds, are

The asymptotic Bode magnitude plot of a system is shown.

Which one of the following options best represents the transfer function of the system?