Online Electronics Test - Electronics Test 2

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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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Which resistive component is designed to be temperature sensitive?

Thermistor

Rheostat

Potentiometer

Photoconductive cell

[#]

Batteries differ from fuel cells in that

a battery is a closed system

a battery uses hydrogen and oxygen to create electricity

a battery uses a polymer electrolyte membrane

none of the above

[#]

If the load in the given circuit is 120 k , what is the loaded output voltage?

4.21 V

15.79 V

16 V

19.67 V

[#]

The ___ of a capacitor affects the time it takes to charge and discharge.

package style

lead arrangement

plate area

voltage rating

[#]

The secondary current in a transformer depends on the secondary voltage and load resistance values.

True

False

[#]

If a 7.5 k

resistance is connected to a 10 k

inductive reactance in a series RL circuit, then the impedance equals 12.5 k

True

False

[#]

The voltage dropped across the resistor in the circuit in the given circuit is approximately equal to ___.

5 V

10 V

7.98 V

6.02 V

[#]

What is the impedance of the circuit in the given circuit?

125.7

297.6

370.1

423.3

[#]

If a periodic pulse waveform is applied to an RC differentiating circuit, which two conditions are possible?

t_w

or t_w > 5

t_w = 5

or t_w > 5

t_w

or t_w < 5

t_w

or t_w < 5

[#]

10.

A pn junction allows current flow when

the p-type material is more positive than the n-type material

the n-type material is more positive than the p-type material

both the n-type and p-type materials have the same potential

there is no potential on the n-type or p-type materials

[#]

11.

The voltage produced by a thermocouple is called the _________.

hot junction voltage

cold junction voltage

Seebeck voltage

Hooke voltage

[#]

12.

The six basic forms of energy are:

light, sun, magnetic, chemical, electrical, and mechanical

electrical, mechanical, light, heat, magnetic, and chemical

electrical, mechanical, sun, heat, chemical, and light

potential, sun, light, chemical, electrical, and mechanical

[#]

13.

If the frequency of a radio wave is increased, then its wavelength will:

increase

decrease

remain the same

cannot tell

[#]

14.

A bipolar junction transistor has ____ regions of operation.

[#]

15.

A NAND gate consists of an AND gate and an OR gate connected in series with each other.

True

False

[#]

16.

Which of the following summarizes the important features of emitter-coupled logic (ECL)?

negative voltage operation, high speed, and high power consumption

good noise immunity, negative logic, high frequency capability, low power dissipation, and short propagation time

slow propagation time, high frequency response, low power consumption, and high output voltage swings

poor noise immunity, positive supply voltage operation, good low-frequency operation, and low power

[#]

17.

A multiplexed display circuit uses a technique called time division modulation.

True

False

[#]

18.

Memory configuration refers to the organization of storage bits within a memory.

True

False

[#]

19.

The difference between analog voltage represented by two adjacent digital codes, or the analog step size, is the:

quantization

accuracy

resolution

monotonicity

[#]

20.

A machine cycle is the time it takes a microprocessor to fetch and execute a complete instruction.

True

False

[#]

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Online Electronics Test - Electronics Test 2

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