Online Electronics Test - Electronics Test 6

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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If the voltage in the given circuit was cut in half, what would the current equal?

10 mA

30 mA

60 mA

90 mA

[#]

The voltage drop across a resistor is simply a difference of potential across that resistor.

True

False

[#]

The ___ rating of a resistor will increase with an increase in the surface area of the resistor.

resistance

current

power

voltage

[#]

These components are in series.

True

False

[#]

After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?

63.2

36.8

13.5

5.0

[#]

A practical inductor

has inductance

has winding resistance

has winding capacitance

all of the above

[#]

Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?

The coil windings must be the same.

coil 1

The coil ratio is too small.

coil 2

[#]

An open secondary winding of a transformer will cause the primary current to be nearly zero.

True

False

[#]

If the capacitor in an RC integrator shorts, the output

is at ground

would measure the same as the input

would measure zero volts

None of the above

[#]

10.

Which circuit is known as a voltage-to-current converter?

[#]

11.

The magnitude that an alternation varies from zero is called its:

altitude

amplitude

attitude

polarity

[#]

12.

What is the name of a device used to directly measure the frequency of a periodic wave?

oscilloscope

frequency meter or counter

audio frequency generator

radio frequency generator

[#]

13.

The natural elements carbon, germanium, and silicon are semiconductors.

True

False

[#]

14.

If this circuit were used in a digital circuit, it would be a NOT gate.

True

False

[#]

15.

The voltage gain of a transistor is inversely proportional to the change in output current.

True

False

[#]

16.

Breakdown voltage and pinch-off voltage of a JFET are different terms for the same voltage level.

True

False

[#]

17.

To get a negative gate-source voltage in a self-biased JFET circuit, you must use a ________.

negative gate supply voltage

ground

voltage divider

source resistor

[#]

18.

The use of a logic probe may be improved through the use of a(n) ________.

logic clip

frequency counter

oscilloscope

current tracer

[#]

19.

Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?

hexadecimal

dual octal outputs

binary-to-hexadecimal

hexadecimal-to-binary

[#]

20.

Select one of the following statements that best describes the parity method of error detection:

Parity checking is best suited for detecting single-bit errors in transmitted codes.

Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.

Parity checking is not suitable for detecting single-bit errors in transmitted codes.

Parity checking is capable of detecting and correcting errors in transmitted codes.

[#]

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Online Electronics Test - Electronics Test 6

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