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Questions and Answers
Which component is used for voltage regulation in a circuit?
What is the primary function of a zener diode in a circuit?
What is the semiconductor material commonly used for making LEDs?
Which of the following is a common application of a zener diode?
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In which biasing mode is an LED typically operated?
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Which electrical apparatus provides emergency power to a load when the mains power fails?
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In a transformer, the cylindrical windings are used for which type of transformer?
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What material is commonly used for the construction of the transformer core?
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In a DC motor, what type of energy conversion takes place?
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The voltage induced in the armature winding of a DC motor is known as what?
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Which type of motor is known as the constant flux motor?
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What type of winding does a universal motor use?
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According to Faraday's Second Law, the magnitude of the induced emf is _____ to the rate of change of flux linkage.
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Which rule can be used to determine the direction of induced emf along with Fleming's right hand rule?
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What can be used to obtain the direction of induced emf in a coil?
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Statically induced emf is associated with a coil due to ______.
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Mutual inductance is defined as _____.
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Zener diodes are also known as _____.
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Study Notes
Voltage Regulation and Diodes
- Zener diodes are used for voltage regulation in a circuit.
- The primary function of a zener diode is to provide a stable reference voltage.
LED Characteristics
- LEDs are commonly made from semiconductor material gallium arsenide phosphide (GaAsP).
- LEDs are typically operated in forward biasing mode.
Zener Diode Applications
- A common application of a zener diode is voltage regulation.
Uninterruptible Power Supply (UPS)
- A UPS provides emergency power to a load when the mains power fails.
Transformer Construction
- Cylindrical windings are used in shell-type transformers.
- The transformer core is commonly made of ferrite or iron.
DC Motor Characteristics
- In a DC motor, electrical energy is converted to mechanical energy.
- The voltage induced in the armature winding of a DC motor is known as electromotive force (EMF).
- A DC motor with a permanent magnet is known as a constant flux motor.
- A universal motor uses a series wound winding.
Electromagnetic Induction
- According to Faraday's Second Law, the magnitude of the induced emf is proportional to the rate of change of flux linkage.
- Fleming's right-hand rule can be used to determine the direction of induced emf, along with Lenz's rule.
- The right-hand thumb rule can be used to obtain the direction of induced emf in a coil.
- Statically induced emf is associated with a coil due to a change in the magnetic field.
- Mutual inductance is defined as the flux linkage between two coils.
- Zener diodes are also known as voltage regulator diodes.
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Description
Test your knowledge on diodes and LEDs with this quiz! Learn about forward bias diodes, breakdown diodes, zener diodes, LED applications, and operating modes. Find out what type of LED is used in a remote control and understand the significance of voltage characteristics.
