WorksheetsELECT 1100 Final Exam Review
Total questions: 40
Worksheet time: 20mins
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: The symbol μ is an abbreviation for 10−6 or micro.
True
False
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: A given rms value of a sine wave is equal to the same value of DC voltage with respect to the work it can do.
True
False
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: Increasing the frequency of a waveform increases the period.
True
False
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: Increasing the plate area of a capacitor increases the capacitance.
True
False
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: The Unit of inductance is the Henry.
True
False
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false: A transformer can be used to step-up (increase) voltage.
True
False
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question: Given the sine wave in Figure 11-1, identify the peak-to-peak voltage.
value A
value B
value C
value D
value E
For Waveform A, you count 4 divisions on the vertical axis on the oscilloscope. The volts-per-division knob is set to 50 mV/div. Given Figure 11-2, what is the peak-to-peak amplitude of Waveform A?
250 mV
50 mV
500 mV
200 mV
You count 5 divisions on the horizontal axis on the oscilloscope. The time-per-division knob is set to 1.0 ms/div. Given Figure 11-2, what is the frequency of Waveform B?
5 Hz
5 kHz
1 kHz
200 Hz
What is the RMS value of an AC peak voltage of 170 VAC?
120V
240V
220V
170V
Find the frequency of a periodic wave that has a period of 60 s.
2.78 mHz
16.7 mHz
27.8 mHz
528 mHz
The unit of measure for frequency is the
cycle
period
hertz
ampere
The period (T) of most AC waveforms is measured in units of
revolutions
alternations
seconds
cycles
Calculate the equivalent value of the parallel capacitors in Figure 12-2. There are three capacitors: 10 μF (35 V), 47 μF (50 V), and 33 μF (100 V), all connected in parallel.
4.7 μF
227.24 μF
90 μF
15510 μF
What is the total inductance in the circuit in Figure 13-2?
8.0 H
2.6 H
1.0 H
4.0 H
With 100 V of primary voltage and a 1:3 turns ratio, the output voltage will be:
100 V
33 V
300 V
Not enough information is given.
What is the voltage in the secondary winding of the transformer if the primary voltage is 120V and the turns ratio is 6:1?
20V
40V
360V
720V
What is the current in the secondary winding of a transformer if the primary current is 1A and the turns ratio is 4:1?
4A
1A
16A
0.25A
A junction diode is :
A component that allows the current to flow in only one direction
A component where current flows from anode to cathode when forward biased
A component that does not conduct current when reverse biased
All of the above
A reverse biased diode acts as
A short circuit
An open circuit
A voltage source
none of the above
Which fo the following is NOT a terminal of a BJT (Bipolar Junction Transistor)?
Gate
Emitter
Collector
Base
A diode can be used as a
Switch
Amplifier
Inverter
Transformer
A transistor can be used as
A switch an da transformer
A switch and an amplifier
A filter and an amplifier
A filter and a transformer
A semiconductor device that produces light when forward biased is called a :
Light Emitting Diode
Light Producing Diode
Photodiode
Solar Cell
How must multimeters be connected in a circuit when used to measure voltage?
Varies with the component being measured
Varies with circuit construction
In series with the component being measured
Directly across the component
How much current flows when a 15 ohm resistor is connected across a 5 V source?
0.5 A
3.0 A
3.3 A
0.33 A
How much voltage is needed to produce a current of 5 A when the resistance is 50 Ω?
2.5 kV
250 V
25 V
2.5 V
Kirchoff's law for parallel circuits states that the:
sum of currents into a junction is equal to the difference of all the branch currents.
total circuit resistance is less than the smallest branch resistor.
sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction.
sum of all branch voltages equal zero.
Kirchoff's law for series circuits states that the:
the current stays the same throughout the entire circuit.
such a law does not exist.
sum of the voltage drops across the resistors equals the voltage source.
the greatest power dissipation is in the resistor with the greatest resistance.
See Figure 5.1. The total resistance in this circuit is:
1 kΩ
7 kΩ
10 kΩ
8 kΩ
See Figure 5.1. The total current I in this circuit is:
2.2 mA
10 mA
1 mA
10 A
See Figure 5.1. The voltage across the 7 kΩ resistor is:
2 V
20 V
70 V
7 V
See Figure 5.1. The total power dissipated by the 7 kΩ resistor is
2 mW
7 mW
1 mW
10 mW
Given the circuit in Figure 6-4, find the total resistance.
300 Ω
66.7 Ω
200 Ω
50.7 Ω
Given the circuit in Figure 6-4, find the total current It.
0.375 A
0.452 A
0.375 A
0.255 A
Given the circuit in Figure 6-4, find the current through R1.
0.024 A
0.187 A
24.8 mA
0.25 A
Given the circuit in Figure 6-4, what is the voltage across R1?
50 V
25 V
12.5 V
100 V
What is the most commonly used conductor in electronics?
gold
aluminum
silver
copper
The opposition to current is called:
resistance
voltage
conductance
insulators
The unit of measurement for current is the:
Ampere
Volt
Watt
Ohm
