Electronic review 2

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15 Terms

1
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What is the main purpose of a bleeder resistor in a power supply circuit?

  1. To stabilize the output voltage

  2. To discharge capacitors when the power is off

  3. To limit the current flow

  4. To protect the circuit against overvoltage

  1. To discharge capacitors when the power is off

2
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What would be the likely outcome if a semiconductor device was subjected to high temperature?

  1. It would start conducting less

  2. It would start conducting more

  3. Its conductive property would remain unchanged

  4. It would transform into an insulator

  1. It would start conducting more

3
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What is the total resistance in a parallel circuit with two resistors of 10 ohms each?

  1. 20 ohms

  2. 10 ohms

  3. 5 ohms

  4. 0 ohms

  1. 5 ohms

In a parallel circuit, the total (or equivalent) resistance is given by the reciprocal of the sum of the reciprocals of individual resistances. Therefore, if two resistors of 10 ohms each are connected in parallel, the total resistance would be 1/((1/10)+(1/10)) = 5 ohms.

4
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What is the primary purpose of a voltage regulator in an electronic circuit?

  1. To amplify signals

  2. To protect against voltage spikes

  3. To maintain a constant output voltage

  4. To limit the current flow

  1. To maintain a constant output voltage

5
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What effect does increasing the frequency of an AC signal have on the reactance of an inductor?

  1. Increases the reactance

  2. Decreases the reactance

  3. Does not change the reactance

  4. Frequency has no relation with reactance

  1. Increases the reactance

6
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What is the relationship between voltage, current, and resistance in an electronic circuit?

  1. Voltage is proportional to current times resistance, or V = IR

  2. Current is proportional to voltage times resistance, or I = VR

  3. Resistance is proportional to voltage times current, or R = VI

  4. Voltage, current, and resistance are unrelated in an electronic circuit

  1. Voltage is proportional to current times resistance, or V = IR

7
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What is the main function of an inductor in an electronic circuit?

  1. To store and release electrical energy

  2. To amplify or switch electronic signals

  3. To filter out high-frequency noise and interference

  4. To provide a reference point for measuring voltage

  1. To store and release electrical energy

8
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In a series-parallel circuit, how is the total resistance calculated?

  1. By adding all resistances in the circuit

  2. By using the product-over-sum formula

  3. By calculating resistances separately for series and parallel sections, then combining the results

  4. By using the reciprocal of the sum of the reciprocals of each resistor

  1. By calculating resistances separately for series and parallel sections, then combining the results

9
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In a transformer, what happens if the secondary coil has more turns than the primary coil?

  1. The output voltage is less than the input voltage

  2. The output voltage is equal to the input voltage

  3. The output voltage is greater than the input voltage

  4. The transformer does not work

  1. The output voltage is greater than the input voltage

10
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What is the primary role of the emitter in a Bipolar Junction Transistor (BJT)?

  1. To emit electrons or holes

  2. To receive electrons or holes

  3. To amplify the signal

  4. To act as a control terminal

  1. To emit electrons or holes

11
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What is the formula for calculating electrical power?

  1. P = IV

  2. P = IR

  3. P = V^2/R

  4. P = I^2R

3.P = V^2/R

12
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Which type of diode is commonly used for voltage regulation?

  1. Zener Diode

  2. Light Emitting Diode

  3. Schottky Diode

  4. Varactor Diode

  1. Zener Diode

13
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What is the impact of increasing the frequency of an AC signal on a capacitive circuit?

  1. The impedance increases

  2. The impedance decreases

  3. The impedance remains the same

  4. The impact depends on the type of capacitor

  1. The impedance decreases

14
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What is the function of a diode in an electronic circuit?

  1. To conduct electrical current in only one direction

  2. To amplify or switch electronic signals

  3. To filter out high-frequency noise and interference

  4. To store and release electrical energy

  1. To conduct electrical current in only one direction

15
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What is the difference between a series-parallel circuit and a parallel-series circuit?

  1. In a series-parallel circuit, components are arranged in both series and parallel configurations, while in a parallel-series circuit, components are arranged in only one configuration

  2. A series-parallel circuit contains only parallel components, while a parallel-series circuit contains only series components

  3. A series-parallel circuit contains both series and parallel components, while a parallel-series circuit contains components that are connected in only one configuration

  4. In a series-parallel circuit, the total resistance is less than the smallest individual resistance, while in a parallel-series circuit, the total resistance is the sum of the individual resistances

  1. In a series-parallel circuit, components are arranged in both series and parallel configurations, while in a parallel-series circuit, components are arranged in only one configuration