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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?

707 V
651 V
208 V
700 V
None of these

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Electronic Principles
The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?

14.8 µA
7.8 µA
None of these
10.3 µA
7.75 µA

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Electronic Principles
In a step-down transformer, which is larger?

Primary voltage
Secondary voltage
Neither
Impossible to say
None of these

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Electronic Principles
A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

7.5 V
None of these
16 V
8 V
3 V

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Electronic Principles
An audio transformer has a turn ratio of 9, What is its impedance ratio?

85
None of these
6
9
81

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Electronic Principles
The Thevenin resistance is equal in value to the

Internal resistance of a Morton circuit
Half the load resistance
None of these
Open-load resistance
Load resistance

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