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Electronic Principles

Electronic Principles
When the graph of current versus voltage is a straight line, the device is referred to as

Active
None of these
Linear
Nonlinear
Bipolar

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Electronic Principles
Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current?

None of these
0.4 A
0.3 A
0.6 A
0.2 A

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Electronic Principles
Household light bulbs have a given power rating, and they operate at 120 V. Which one of the following equations most directly provides the current rating of these light bulbs?

P = I2R
I = P/E
None of these
P = IE
P = E2/R

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Electronic Principles
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?

I = ER
E = PR
I = E/R
E = I2R
None of these

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Electronic Principles
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 these
0.041666666666667
0.93 V
9.3 W
0.93 W

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Electronic Principles
A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

None of these
410 Ohm
310 Ohm
400 Ohm
550 Ohm

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