Electronic Principles
Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?

20 Ohm
10 Ohm
30 Ohm
None of these
100 Ohm

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Electronic Principles
What is a free electron?

An electron that costs nothing
An electron that has been freed from its parent atom
An electron that has no electrical charge
None of these
An electron that has twice the amount of charge of a normal electron

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Electronic Principles
What is the primary difference between primary and secondary cell batteries?

None of these
Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries

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Electronic Principles
Which one of the following is a direct statement of Ohm's law?

The algebraic sum of voltages in a loop is equal to zero
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The total resistance of a parallel circuit is less than the value of the smallest resistance
None of these
The algebraic sum of currents entering and leaving a point is equal to zero

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