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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
I = ER
E = I2R
E = PR
I = E/R
When the Q point moves along the load line, the voltage increases when the current
None of the above
Can be any of above
stays the same
Increases
Decreases
The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values
9.3 W
1 A
0.93 W
0.93 V
None of the above
The knee voltage of a diode is approximately equal to the
barrier potential
applied voltage
None of the above
breakdown voltage
forward voltage
If a load resistance is 1 kW, a stiff voltage source has a resistance of
None of the above
At least 10 Ohm
Less than 100 k Ohm
More 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
None of the above
Active
Bipolar
Nonlinear
Linear
What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it
6 W
3 W
122 W
64 W
None of the above
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
None of the above
60 Ohm
70.7Ohm
99.3 Ohm
What kind of device is a diode
Nonlinear
Unipolar
None of the above
Bilateral
Linear
Which one of the following devices is most often used for measuring opposition to current flow in a circuit
Wattmeter
Ohmmeter
Ammeter
Voltmeter
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
10 Å
2.02 A
0.955 A
None of the above
0.02 A
Doubling the operating frequency of an inductive circuit
has no effect on the inductive reactance
cuts the inductive reactance in half
multiplies the inductive reactance by 6.28
doubles the amount of inductive reactance
None of the above
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
20 V
None of the above
18.8 V
0.17 V
10.17 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
89.3 ohm
88.8 ohm
None of the above
77.7 ohm
224 ohm
Current is
None of the above
The number of free electrons in an atom
An imbalance of electrical charges
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
None of the above
Ammeter
Ohmmeter
Voltmeter
Wattmeter
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 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 total voltage is equal to the sum of the voltages across the resistance and capacitance
The equivalent of 1 megohms is
100,000 ohm
one million ohms
None of the above
1 k ohm
one-millionth of an ohm
A loadstone is
a natural magnet
a temporary magnet
None of the above
a paramagnetic alloy
an artificial magnet
1
2
6
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