How Much Do You Really Know About Electronics Engineering?

A capacitor

Filters out a DC voltage.

Produces an induced voltage as current varies.

Amplifies a DC voltage.

Is constructed from a coil.

Which of the following is NOT true for a step-up transformer?

The current in the secondary is higher than the primary.

The voltage across the secondary is higher than the primary.

The power in the secondary equals the power in the primary.

The number of turns in the secondary is higher than the turns in the primary.

Which of the following is NOT true of a transistor?

It can be used to amplify current.

It can function as a switch.

Its development ushered in the digital age.

It is an insulator.

A 10 V source is applied two 20 ohm resistors in series. What is the voltage across each resistor?

2 V

5 V

10 V

4 V

The advantage of an op-amp is that

It attenuates the noise common to the two inputs.

It amplifies the noise common to the two inputs.

It amplifies the two inputs individually.

It doesn’t amplify low frequency signals.

According to Kirchhoff’s Voltage Law,

The sum of the voltages into a node is equal to zero.

The sum of the voltages around a closed loop is equal to the supply voltage.

The sum of the voltages around a closed loop is equal to zero.

Voltage is proportional to current in a resistive network.

Which of the following is NOT true for a low-pass filter with a cutoff of 80Hz?

The bandwidth is 80 Hz.

Frequencies below 80 Hz pass through the circuit.

Frequencies above 80 Hz are attenuated.

DC will be blocked.

The frequency of a DC signal is

60 Hz

0 Hz

Depends on the frequency of the source

Is twice the AC signal

In an RLC circuit at the resonant frequency,

All the frequency components of the input signal are provided at the output.

A narrow band of frequencies in the input will be passed to the output.

The frequency component corresponding to the resonant frequency is attenuated.

Either the capacitive or inductive reactance goes to zero.

A 20 V source is applied to a 20 ohm and 10 ohm resistor in parallel. What is the current through the 10 ohm resistor?

0.67 A

6.7 A

1 A

2 A

According to the sampling theorem, an analog signal should be sampled at a rate that is

At least half the frequency of its bandwidth.

At most half the frequency of its bandwidth.

At least twice the frequency of its bandwidth.

At most twice the frequency of its bandwidth.

In electronics, a flip-flop or latch is

A type of shoe worn in the summer.

A device which can be used to hold a door closed.

A circuit which can be used to store a HIGH or LOW state.

A device which selects one of many inputs and places it on the output.

An FPGA is a device which

Has a processor core and memory with input/output peripherals.

Allows you to create a digital circuit using a hardware descriptive language.

Is another type of microcontroller.

Allows a designer to download and execute a C/C++ program in real-time.

Phasor representation is used in AC analysis to

Remove the frequency dependency of the AC analysis.

Convert the analysis to simpler DC analysis.

Determine the bandwidth of a system which has capacitors and inductors.

Represent a sinusoid as a complex number with amplitude and phase.

A bode plot

Provides the frequency response of a system.

Is a polar plot of magnitude and phase of a system.

Is a time-based plot of output against input.

Is a plot of power dissipation over time.

How Much Do You Really Know About Electronics Engineering?

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