palaECEpan 2022 ELECTRONICS

A DC signal has a frequency of ______.

• 0

• 1

• -1

• Infinite

Convert 3790 base 10 to hexadecimal.

• IEC

• EEE

• ECE

• ENG

What theorem replaces a complex network with an equivalent circuit containing a source voltage and a series of resistance?

• De morgan's Theorem

• Shannon's Theorem

• Norton's Theorem

• Thevenin's Theorem

Type of feedback needed to generally lower the distortion and prevent oscillation.

A load takes 50kW at a power factor of 0.8 lagging. Calculate the apparent power.

• S = 62.5kVA

• S = 61.5kVA

• S = 62.7kVA

• S = 61.7kVA

Answer explanation

The output of a rectifier circuit without a filter included is _______.

• DC

• AC

• Pulsating DC

• Pulsating AC

SCARA stands for _______________.

The ripple factor of a full-wave bridge rectifier is ________.

• 0.48

• 0.49

• 0.47

• 0.46

The current at resonance in a series L-C-R circuit is 0.2 mA. If the applied voltage is 250 mV at a frequency of 100 kHz and the circuit capacitance is 0.04 uF, find the circuit inductance.

Answer explanation

A coil of resistance 25 ohms and inductance 100 mH is connected in series with a capacitance of  0.12 uF across a 200 V, variable frequency supply. Find the Q-factor.

Answer explanation