Q. For a parallel circuit with two identical resistors, the total current is:
A.
Half of the current through one resistor
B.
Equal to the current through one resistor
C.
Twice the current through one resistor
D.
Zero
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Solution
In a parallel circuit with two identical resistors, the total current is twice the current through one resistor, as each resistor carries the same current.
Correct Answer:
C
— Twice the current through one resistor
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Q. How does the current through each component in a parallel circuit relate to the total current?
A.
It is equal to the total current
B.
It is less than the total current
C.
It is greater than the total current
D.
It is independent of the total current
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Solution
In a parallel circuit, the current through each component is less than the total current, as the total current is the sum of the currents through each branch.
Correct Answer:
B
— It is less than the total current
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Q. If two resistors are connected in parallel, how do you calculate the total resistance?
A.
R_total = R1 + R2
B.
R_total = 1 / (1/R1 + 1/R2)
C.
R_total = R1 * R2
D.
R_total = R1 - R2
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Solution
The total resistance in a parallel circuit is calculated using the formula R_total = 1 / (1/R1 + 1/R2).
Correct Answer:
B
— R_total = 1 / (1/R1 + 1/R2)
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Q. If two resistors are connected in parallel, the total resistance is:
A.
Greater than the smallest resistor
B.
Equal to the smallest resistor
C.
Less than the smallest resistor
D.
Equal to the sum of the resistances
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Solution
The total resistance in a parallel circuit is always less than the smallest resistor due to the formula 1/R_total = 1/R1 + 1/R2.
Correct Answer:
C
— Less than the smallest resistor
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Q. In a parallel circuit with a diode, if the diode is forward-biased, it will:
A.
Block current
B.
Allow current to flow
C.
Short-circuit the circuit
D.
Increase the total resistance
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Solution
A forward-biased diode allows current to flow through it, affecting the overall current in the parallel circuit.
Correct Answer:
B
— Allow current to flow
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Q. In a parallel circuit with a diode, what is the effect of reverse bias on the diode?
A.
It conducts current
B.
It blocks current
C.
It increases voltage
D.
It decreases resistance
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Solution
When a diode is reverse biased in a parallel circuit, it blocks current flow, effectively acting as an open circuit.
Correct Answer:
B
— It blocks current
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Q. In a parallel circuit with three resistors, if one resistor fails open, what happens to the circuit?
A.
The circuit stops working
B.
The total resistance increases
C.
The total current decreases
D.
The other resistors continue to function
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Solution
In a parallel circuit, if one resistor fails open, the other resistors continue to function, and the circuit remains operational.
Correct Answer:
D
— The other resistors continue to function
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Q. In a parallel circuit, how does the power dissipated by each resistor relate to the total power?
A.
Total power is the sum of individual powers
B.
Total power is the product of individual powers
C.
Total power is the average of individual powers
D.
Total power is the maximum of individual powers
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Solution
In a parallel circuit, the total power dissipated is the sum of the power dissipated by each resistor.
Correct Answer:
A
— Total power is the sum of individual powers
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Q. In a parallel circuit, if one branch fails open, what happens to the other branches?
A.
They stop working
B.
They continue to operate normally
C.
They short-circuit
D.
They increase in voltage
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Solution
In a parallel circuit, if one branch fails open, the other branches continue to operate normally as they are independent paths.
Correct Answer:
B
— They continue to operate normally
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Q. In a parallel circuit, if one resistor fails open, what happens to the other resistors?
A.
They stop working
B.
They continue to operate normally
C.
They short circuit
D.
They increase in resistance
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Solution
If one resistor in a parallel circuit fails open, the other resistors continue to operate normally as they are still connected to the same voltage source.
Correct Answer:
B
— They continue to operate normally
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Q. In a parallel circuit, the power consumed by each component is:
A.
The same
B.
Different
C.
Dependent on the voltage
D.
Dependent on the current
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Solution
The power consumed by each component in a parallel circuit can be different, depending on the resistance and current through each component.
Correct Answer:
B
— Different
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Q. In a parallel circuit, the voltage across each component is:
A.
The same
B.
Different
C.
Dependent on the current
D.
Dependent on the resistance
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Solution
In a parallel circuit, all components share the same voltage across their terminals.
Correct Answer:
A
— The same
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Q. In a parallel circuit, what is the voltage across each component?
A.
The same as the total voltage
B.
Different for each component
C.
Zero volts
D.
The average of all voltages
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Solution
In a parallel circuit, the voltage across each component is the same as the total voltage applied across the circuit.
Correct Answer:
A
— The same as the total voltage
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Q. In a small-signal model of a parallel circuit, how are the components represented?
A.
As linear elements only
B.
As nonlinear elements only
C.
As a combination of linear and nonlinear elements
D.
As ideal voltage sources
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Solution
In a small-signal model, components are typically represented as linear elements to simplify analysis around a bias point.
Correct Answer:
A
— As linear elements only
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Q. In a small-signal model of a parallel circuit, the output voltage is:
A.
The same as the input voltage
B.
Dependent on the load
C.
Always zero
D.
Equal to the sum of the input voltages
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Solution
In a small-signal model, the output voltage is dependent on the load and the configuration of the circuit.
Correct Answer:
B
— Dependent on the load
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Q. In semiconductor physics, what happens to the current in a parallel diode configuration when the temperature increases?
A.
Current decreases
B.
Current remains constant
C.
Current increases
D.
Current becomes zero
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Solution
In a parallel diode configuration, as the temperature increases, the current typically increases due to reduced barrier potential.
Correct Answer:
C
— Current increases
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Q. What is the effect of adding a capacitor in parallel with a resistor?
A.
It increases the total resistance
B.
It decreases the total resistance
C.
It creates a short circuit
D.
It affects the time constant
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Solution
Adding a capacitor in parallel with a resistor affects the time constant of the circuit, as it introduces a reactive component.
Correct Answer:
D
— It affects the time constant
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Q. What is the effect of connecting a diode in parallel with a resistor?
A.
It increases the resistance
B.
It allows current to bypass the resistor
C.
It blocks all current
D.
It changes the voltage across the resistor
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Solution
Connecting a diode in parallel with a resistor allows current to bypass the resistor when the diode is forward-biased.
Correct Answer:
B
— It allows current to bypass the resistor
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Q. What is the primary advantage of using parallel circuits in electronic devices?
A.
Increased voltage
B.
Increased current capacity
C.
Redundancy and reliability
D.
Simplicity in design
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Solution
The primary advantage of using parallel circuits is redundancy and reliability; if one component fails, the others can still function.
Correct Answer:
C
— Redundancy and reliability
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Q. What is the primary characteristic of a FET in a parallel configuration?
A.
It can only operate in saturation
B.
It allows for high input impedance
C.
It requires a constant voltage
D.
It behaves like a short circuit
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Solution
A FET in a parallel configuration allows for high input impedance, making it suitable for various applications.
Correct Answer:
B
— It allows for high input impedance
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Q. What is the role of an operational amplifier in a parallel circuit configuration?
A.
To increase voltage
B.
To amplify current
C.
To provide feedback
D.
To act as a switch
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Solution
An operational amplifier in a parallel circuit configuration is often used to provide feedback, which can stabilize and control the circuit's behavior.
Correct Answer:
C
— To provide feedback
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Q. When analyzing a parallel circuit with BJTs, the base current is:
A.
Equal to the collector current
B.
Dependent on the emitter current
C.
Independent of the other branches
D.
Always zero
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Solution
In a parallel circuit with BJTs, the base current is independent of the other branches, as each BJT operates based on its own input.
Correct Answer:
C
— Independent of the other branches
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Q. When analyzing small-signal models in parallel circuits, what is typically assumed about the components?
A.
They are all linear
B.
They are all non-linear
C.
They have infinite resistance
D.
They have zero capacitance
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Solution
In small-signal models, it is typically assumed that the components are linear to simplify analysis.
Correct Answer:
A
— They are all linear
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