Electronic Principles
Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode

10 mA
None of these
12 mA
11 mA
14 mA

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Electronic Principles
Which one of the following phrases best describes residual magnetism?

Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
The amount of magnetic flux that is not confined to the core material of an electromagnet
The force of attraction between the poles of a permanent and temporary magnetic field
The circular magnetic field that surrounds a conductor carrying a current
None of these

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Electronic Principles
What is a negative ion?

An atom that contains more protons than neutrons
An atom that contains more electrons than protons
An atom that contains more electrons than neutrons
None of these
An atom that contains more protons than electrons

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