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Electronic Principles

Electronic Principles
A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?

651 V
707 V
700 V
None of these
208 V

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Electronic Principles
A dielectric material is:

None of these
a good insulator
a good conductor
a good conductor of magnetic fields
a poor conductor of electrostatic fields

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Electronic Principles
A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?

99 Ohm - 102 ohm
90 Ohm - 101 ohm
90 Ohm - 110 ohm
98 Ohm - 100.1 ohm
None of these

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Electronic Principles
Holes act like:

Negative charges
None of these
Atoms
Positive charges
Crystals

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Electronic Principles
What causes the depletion layer?

Ions
None of these
Recombination
Barrier potential
Doping

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Electronic Principles
How may valence electrons does a silicon atom have?

1
2
None of these
4

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