Test: Diode Circuits - 2 - Electronics and Communication Engineering (ECE) MCQ

In the question a circuit and a waveform for the input voltage is given. The diode in circuit has cutin voltage V_γ = 0. Choose the option for the waveform of output voltage v_o 

For the circuit in fig. P.3.1.5, let cutin voltage V_γ = 0.7 V. The plot of v_o verses v_i for -10 ≤ v_i ≤10 V is:

The circuit inside the box in fig. contains only resistor and diodes. The terminal voltage v_o is connected to some point in the circuit inside the box. The largest and smallest possible value of v_o most nearly to is respectively.

In the voltage regulator circuit in fig. the maximum load current i_L that can be drawn is:

The value of power dissipated across the Zener diode (V_z=15 V) connected in the circuit as shown in the figure is x × 10⁻¹ watts.

The value of x to the nearest integer is

The Q-point for the Zener diode in fig. is:

In the voltage regulator circuit in fig  the power rating of Zener diode is 400 mW. The value of R_L that will establish maximum power in Zener diode is:

In the voltage regulator circuit in fig.  the Zener diode current is to be limited to the range 5 ≤ i_z ≤100 mA.

The range of possible load current is:

In the voltage regulator circuit in fig.  the Zener diode current is to be limited to the range 5 ≤ i_z ≤100 mA.

The range of possible load resistance is:

In the voltage regulator circuit in fig.  the Zener diode current is to be limited to the range 5 ≤ i_z ≤100 mA.

The power rating required for the load resistor is:

The secondary transformer voltage of the rectifier circuit shown in fig. is v_s = 60 sin 2π 60tV. Each diode has a cut in voltage of V_γ = 0.6 V. The ripple voltage is to be no more than V_rip = 2 V. The value of filter capacitor will be:

The input to full-wave rectifier in fig. is v_i = 120 sin2π60t V. The diode cutin voltage is 0.7 V. If the output voltage cannot drop below 100 V, the required value of the capacitor is: