# Grade 11 - Electrical Fundamentals - Module 1

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• 1.

### The symbol given here is

• A.

Capacitor

• B.

Resistor

• C.

Voltage

• D.

Inductor

D. Inductor
Explanation
The symbol given here represents an inductor. An inductor is an electronic component that stores energy in a magnetic field when an electric current flows through it. It is typically represented by a coil of wire. Inductors are commonly used in electronic circuits to control the flow of current, filter out unwanted frequencies, and store energy.

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• 2.

### The resistance offred by the inductor in the picture below is

• A.

Ac resistance

• B.

Ac Inductance

• C.

Reactance

• D.

Capacitive reactance

C. Reactance
Explanation
The resistance offered by an inductor is known as reactance. Reactance is a measure of the opposition to the flow of alternating current (AC) caused by the inductor. Unlike resistance, which is caused by energy dissipation in a circuit, reactance is caused by the inductor's ability to store and release energy in the form of a magnetic field. Reactance is typically measured in ohms and can be either capacitive or inductive, depending on the frequency of the AC signal and the characteristics of the inductor.

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• 3.

### The formula given here is

• A.

Inductive reactance

• B.

Capacitive reactance

• C.

Inductive resistance

• D.

DC resistance

A. Inductive reactance
Explanation
The given formula includes terms such as inductive reactance, capacitive reactance, inductive resistance, and DC resistance. Among these terms, the correct answer is "Inductive reactance". This term refers to the opposition that an inductor presents to the flow of alternating current (AC). It is measured in ohms and depends on the frequency of the AC signal and the inductance of the inductor. Inductive reactance is directly proportional to the frequency and inductance, and inversely proportional to the angular velocity.

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• 4.

### Which Inductor have more inductance

• A.

A

• B.

B

• C.

Equal

• D.

Not comparable

B. B
Explanation
The given question is asking which inductor has more inductance. The answer is "B" because it implies that there is another inductor (inductor "A") being compared to inductor "B". Therefore, inductor "B" has more inductance compared to inductor "A".

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• 5.

### The inductors are connected

• A.

Series

• B.

Parallel

• C.

Combinational

• D.

Non of the above

A. Series
Explanation
The inductors are connected in series when they are connected one after another, forming a single path for the flow of current. In this configuration, the total inductance is the sum of the individual inductances. The series connection of inductors is characterized by the same current flowing through each inductor, and the voltage across the combination is the sum of the individual voltages across each inductor.

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• 6.

### The inductors are connected in

• A.

Series

• B.

Parallel

• C.

Combinational

• D.

Non of the above

B. Parallel
Explanation
The inductors are connected in parallel when their terminal ends are connected together. In a parallel connection, the voltage across each inductor is the same, while the current through each inductor may vary. This configuration allows the total inductance to be reduced compared to a single inductor, resulting in a lower overall impedance. It is commonly used in circuits where the goal is to increase current carrying capacity or to create a resonant circuit.

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• 7.

### The formula is

• A.

Capacitor resistance

• B.

Capacitor reactance

• C.

Inductor reactance

• D.

Inductor resistance

B. Capacitor reactance
Explanation
The formula provided is a combination of terms related to capacitors and inductors. Capacitor reactance is a term used to describe the opposition of a capacitor to alternating current. It is calculated by dividing the reciprocal of the product of the frequency and the capacitance. In this formula, capacitor reactance is the only term related to capacitors, while the other terms are related to inductors. Therefore, the correct answer is capacitor reactance.

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• 8.

### The type of capacitor

• A.

Polarized

• B.

Non polarized

• C.

Variable

• D.

All of the above

A. Polarized
Explanation
A polarized capacitor is a type of capacitor that has a positive and negative terminal. It is designed to operate with a specific polarity, meaning that the positive terminal must be connected to the higher voltage and the negative terminal to the lower voltage. This type of capacitor is commonly used in applications where the polarity of the voltage is important, such as in DC circuits. Non-polarized capacitors, on the other hand, do not have a specific polarity and can be connected in either direction. Variable capacitors are capacitors whose capacitance can be adjusted manually or electronically. Therefore, the correct answer is polarized, as it refers to a specific type of capacitor.

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• 9.

### The type of capacitor is

• A.

Polarized

• B.

Non polarized

• C.

Variable

• D.

All of the above

B. Non polarized
Explanation
Non polarized capacitors are designed to be able to work with both positive and negative voltages, unlike polarized capacitors which can only work with one polarity. Variable capacitors, on the other hand, are capacitors that have adjustable capacitance, allowing for tuning or adjustment of the circuit. Therefore, the correct answer is "non polarized" because it includes both non polarized capacitors and variable capacitors.

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• 10.

### The capacitor shown is

• A.

Polarized

• B.

Non polarized

• C.

Variable

• D.

All of the above

C. Variable
Explanation
The given answer, "variable," is correct because the capacitor shown in the question can be adjusted to have different capacitance values. This suggests that the capacitor is a variable capacitor, which means its capacitance can be changed manually or electronically. In contrast, a polarized capacitor has a specific polarity and must be connected in the correct orientation, while a non-polarized capacitor can be connected in any direction without affecting its functionality. Therefore, the correct answer is "variable."

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• 11.

### The capacitors are connected in

• A.

Series

• B.

Parallel

• C.

Combinational

• D.

Non of the above

A. Series
Explanation
The capacitors are connected in series when they are arranged one after the other, with the positive terminal of one capacitor connected to the negative terminal of the next capacitor. In this configuration, the total capacitance is reduced, and the voltage across each capacitor is the same.

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• 12.

### The capacitor is

• A.

Discharging

• B.

Charging

• C.

Resting

• D.

All of the above

B. Charging
Explanation
The correct answer is charging because when a capacitor is charging, it is accumulating and storing electrical energy. This occurs when a voltage source is connected to the capacitor, causing current to flow into it and gradually increase the charge on the capacitor plates.

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• 13.

### The capacitor is

• A.

Discharging

• B.

Charging

• C.

Resting

• D.

Non of the above

A. Discharging
Explanation
The correct answer is "discharging" because when a capacitor is discharging, it is releasing the stored electrical energy. This occurs when the capacitor is connected to a circuit with a lower voltage than the voltage across the capacitor. As a result, the charge stored in the capacitor flows out, causing the voltage across the capacitor to decrease over time.

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• 14.

### The time constant of a resiator , capacitor circuit is

• A.

R X C

• B.

R/C

• C.

R+C

• D.

5 C

A. R X C
Explanation
The time constant of a resistor-capacitor circuit is given by the product of the resistance (R) and the capacitance (C). This product represents the time it takes for the capacitor to charge or discharge to approximately 63.2% of its final value. Therefore, the correct answer is R x C.

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• 15.

### The charging time and discharging time of a capacitor

• A.

Same

• B.

Not same

• C.

Can not calculate

• D.

Non of the above

A. Same
Explanation
The correct answer is "same". This means that the charging time and discharging time of a capacitor are equal. When a capacitor is being charged, it takes a certain amount of time for it to reach its maximum charge. Similarly, when the capacitor is being discharged, it takes the same amount of time for it to completely discharge. This is because the charging and discharging processes of a capacitor follow the same principles and are governed by the same equations.

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• Current Version
• Apr 16, 2024
Quiz Edited by
ProProfs Editorial Team
• Feb 06, 2012
Quiz Created by
Prajesh

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