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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
None of the above
E = I2R
E = PR
I = ER
I = E/R
When the Q point moves along the load line, the voltage increases when the current
Increases
None of the above
Decreases
Can be any of above
stays the same
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values
None of the above
0.93 W
0.93 V
1 A
9.3 W
The knee voltage of a diode is approximately equal to the
forward voltage
applied voltage
breakdown voltage
None of the above
barrier potential
If a load resistance is 1 kW, a stiff voltage source has a resistance of
More than 100 k Ohm
At least 10 Ohm
None of the above
Less than 100 k Ohm
Less than 10 Ohm
When the graph of current versus voltage is a straight line, the device is referred to as
Nonlinear
Active
Linear
Bipolar
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
122 W
None of the above
3 W
6 W
64 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
60 Ohm
250 ohm
None of the above
70.7Ohm
99.3 Ohm
What kind of device is a diode
Linear
Nonlinear
Unipolar
None of the above
Bilateral
Which one of the following devices is most often used for measuring opposition to current flow in a circuit
Voltmeter
Ohmmeter
Ammeter
Wattmeter
None of the above
Doubling the operating frequency of a capacitive circuit
None of the above
cuts the capacitive reactance in half
doubles the amount of a capacitive reactance
multiplies the capacitive reactance by 6.28
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
0.02 A
None of the above
2.02 A
10 Å
Doubling the operating frequency of an inductive circuit
has no effect on the inductive reactance
doubles the amount of inductive reactance
None of the above
cuts the inductive reactance in half
multiplies the inductive reactance by 6.28
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
None of the above
10.17 V
0.17 V
18.8 V
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
88.8 ohm
89.3 ohm
224 ohm
None of the above
77.7 ohm
Current is
None of the above
An imbalance of electrical charges
The number of free electrons in an atom
The flow of charged particles through a material
The force that causes electrons to flow
Which one of the following is most likely used for measuring the rate of electron flow
Ohmmeter
None of the above
Ammeter
Voltmeter
Wattmeter
Which one of the following statements is true for the voltage in a parallel RC circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of the above
The total voltage leads the total current by less than 90 degree
The equivalent of 1 megohms is
one-millionth of an ohm
None of the above
100,000 ohm
1 k ohm
one million ohms
A loadstone is
a paramagnetic alloy
None of the above
a natural magnet
an artificial magnet
a temporary magnet
1
2
6
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