ELECTRONIC PRINCIPLES QUIZ

A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?

10 Ohm

50 Ohm

None of these

60 Ohm

100 Ohm or more

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Doubling the number of turns of wire in an inductor:

multiplies the value of inductance by four

multiplies the value of inductance by two

None of these

reduces the value of inductance by one-half

reduces the value of inductance by one-fourth

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A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

None of these

1000 A

0.41666666666667

0.1 A

100 A

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Assuming 100% efficiency, what is the power being consumed at the secondary winding of the transformer described in question 91?

20 W

200 W

1000 W

None of these

100 W

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A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have?

550 Ohm

310 Ohm

410 Ohm

None of these

400 Ohm

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The total impedance of a series RLC circuit:

always increases as the applied frequency increases

None of these

is maximum at the resonant frequency

is minimum at the resonant frequency

always decreases as the applied frequency increases

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Which one of the following is a statement of Kirchhoffs current law?

The algebraic sum of currents entering and leaving a point is equal to zero

None of these

The total current in a parallel circuit is less than the value of the smallest current

The algebraic sum of currents in a loop is equal to zero

The current through a resistance is proportional to the value of resistance and the IR drop across it

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If the current gain is 200 and the collector current is 100 mA, the base current is

200 A

None of these

0.083333333333333

0.5 mA

2 mA

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A transistor has a current gain of 125 and a base current of 30 Ã‚ÂµA. What is the collector current?

13 mA

0.05 mA

3.75 mA

3.2 mA

None of these

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YOUR ANSWER : ?

Which one of the following statements is true for voltage in a series circuit?

None of these

The total voltage in a series circuit is always less than the value of the smallest voltage

The total voltage of a series circuit is equal to the total current divided by the total resistance

The total voltage in a series circuit is equal to the average value of the individual voltages

The total voltage is equal to the sum of the individual voltages in a series circuit

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