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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 = PR
I = E/R
I = ER
None of the above
E = I2R
When the Q point moves along the load line, the voltage increases when the current
Increases
None of the above
Can be any of above
Decreases
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
1 A
0.93 W
None of the above
9.3 W
0.93 V
The knee voltage of a diode is approximately equal to the
None of the above
forward voltage
applied voltage
barrier potential
breakdown voltage
If a load resistance is 1 kW, a stiff voltage source has a resistance of
Less than 10 Ohm
Less than 100 k Ohm
None of the above
At least 10 Ohm
More than 100 k Ohm
When the graph of current versus voltage is a straight line, the device is referred to as
Active
None of the above
Nonlinear
Bipolar
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
122 W
64 W
3 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
99.3 Ohm
None of the above
60 Ohm
250 ohm
70.7Ohm
What kind of device is a diode
None of the above
Unipolar
Nonlinear
Linear
Bilateral
Which one of the following devices is most often used for measuring opposition to current flow in a circuit
Ammeter
Voltmeter
None of the above
Ohmmeter
Wattmeter
Doubling the operating frequency of a capacitive circuit
doubles the amount of a capacitive reactance
has no effect on the capacitive reactance
cuts the capacitive reactance in half
multiplies the capacitive reactance by 6.28
None of the above
How much current flows through a 0.02-H choke that is operating from a 12-V ac, 100-Hz source
0.02 A
10 Å
0.955 A
None of the above
2.02 A
Doubling the operating frequency of an inductive circuit
None of the above
cuts the inductive reactance in half
doubles the amount of inductive reactance
multiplies the inductive reactance by 6.28
has no effect on the inductive reactance
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
0.17 V
None of the above
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
None of the above
77.7 ohm
89.3 ohm
88.8 ohm
224 ohm
Current is
None of the above
The number of free electrons in an atom
The flow of charged particles through a material
The force that causes electrons to flow
An imbalance of electrical charges
Which one of the following is most likely used for measuring the rate of electron flow
Ammeter
Voltmeter
Wattmeter
Ohmmeter
None of the above
Which one of the following statements is true for the voltage in a parallel RC circuit
The total voltage is less than 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 leads the total current by less than 90 degree
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
one million ohms
100,000 ohm
1 k ohm
None of the above
one-millionth of an ohm
A loadstone is
a paramagnetic alloy
an artificial magnet
None of the above
a natural magnet
a temporary magnet
1
2
6
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