Electronic Principles
If a load resistance is 1 kW, a stiff current source has a resistance of

None of these
At least 10 Ohm
Less than 10 Ohm
Less than 100 k Ohm
More than 100 k Ohm

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Electronic Principles
In a pure inductor:

ac current lags the voltage by 90 degree
ac current and voltage are exactly in phase
ac current leads the voltage by 90 degree
ac current is converted to dc voltage
None of these

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Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

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

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