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Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it
E = I2R
None of the above
I = E/R
E = PR
I = ER
When the Q point moves along the load line, the voltage increases when the current
Can be any of above
stays the same
Increases
Decreases
None of the above
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values
0.93 V
None of the above
0.93 W
9.3 W
1 A
The knee voltage of a diode is approximately equal to the
forward voltage
breakdown voltage
None of the above
barrier potential
applied voltage
If a load resistance is 1 kW, a stiff voltage source has a resistance of
Less than 10 Ohm
More than 100 k Ohm
None of the above
At least 10 Ohm
Less than 100 k Ohm
When the graph of current versus voltage is a straight line, the device is referred to as
Bipolar
Nonlinear
Active
Linear
None of the above
What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it
64 W
None of the above
3 W
122 W
6 W
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm
250 ohm
99.3 Ohm
70.7Ohm
60 Ohm
None of the above
What kind of device is a diode
Bilateral
Unipolar
Linear
None of the above
Nonlinear
Which one of the following devices is most often used for measuring opposition to current flow in a circuit
Voltmeter
Wattmeter
None of the above
Ohmmeter
Ammeter
Doubling the operating frequency of a capacitive circuit
multiplies the capacitive reactance by 6.28
doubles the amount of a capacitive reactance
cuts the capacitive reactance in half
None of the above
has no effect on the capacitive reactance
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source
0.955 A
10 Å
0.02 A
2.02 A
None of the above
Doubling the operating frequency of an inductive circuit
multiplies the inductive reactance by 6.28
doubles the amount of inductive reactance
has no effect on the inductive reactance
None of the above
cuts the inductive reactance in half
Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA
10.17 V
18.8 V
0.17 V
None of the above
20 V
What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W
224 ohm
None of the above
88.8 ohm
77.7 ohm
89.3 ohm
Current is
The flow of charged particles through a material
None of the above
An imbalance of electrical charges
The number of free electrons in an atom
The force that causes electrons to flow
Which one of the following is most likely used for measuring the rate of electron flow
Ohmmeter
Ammeter
Voltmeter
Wattmeter
None of the above
Which one of the following statements is true for the voltage in a parallel RC circuit
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage leads the total current by less than 90 degree
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of the above
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The equivalent of 1 megohms is
100,000 ohm
None of the above
one million ohms
one-millionth of an ohm
1 k ohm
A loadstone is
a temporary magnet
a natural magnet
a paramagnetic alloy
an artificial magnet
None of the above
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