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Electronic Principles

Electronic Principles
How much current flows through a 60-W light bulb that is operating at 120 V?

0.5A
7200 A
180 A
0.083333333333333
None of these

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Electronic Principles
Holes are the minority carriers in which type of semiconductor?

Intrinsic
n-type
p-type
None of these
Extrinsic

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Electronic Principles
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?

5 Ohm
100 Ohm
6 Ohm
None of these
50 Ohm or more

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Electronic Principles
The merging of a free electron and a hole is called

Covalent bonding
Thermal energy
None of these
Lifetime
Recombination

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Electronic Principles
Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?

Reluctance
None of these
Flux density
Number of lines of force
Magnetomotive force

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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
0.2 A
0.4 A
0.6 A
0.3 A

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