18 Questions
What is the role of a Zener diode in a circuit?
Voltage regulator
When a capacitor filter is used, what happens to the ripple factor if the frequency of the input signal is decreased?
Ripple factor increases
In an electrical system, if the load is always connected to the inverter, what type of UPS is most likely being used?
Online UPS
Which semiconductor material is commonly used for manufacturing LEDs?
Gallium arsenide
What does the voltage Vz of a Zener diode represent?
Breakdown voltage
If RL is decreased, what happens to the ripple factor of a capacitor filter?
Ripple factor increases
In a transformer, if the secondary voltage frequency is lower than the primary voltage frequency, what does this imply?
The number of windings in the secondary coil is greater than the primary coil
Which material is commonly used for the construction of transformer cores due to its magnetic properties?
Silicon steel
What type of winding is typically used in a transformer that provides a double magnetic circuit?
Shell winding
In a DC motor, what type of energy conversion occurs?
Electrical energy into mechanical energy
What is the name given to the voltage induced in the armature winding of a DC motor?
Back EMF
Which type of motor, when started, should never be run on no load?
DC shunt motor
As per Faraday's Second Law, the magnitude of the induced emf is ______ to the rate of change of flux linkage.
Directly proportional
The two methods available to decide the direction of induced emf are Fleming’s right hand rule and ________.
Lenz’s law
According to Fleming’s right hand rule, the ______ points in the direction of lines of force.
First finger
The direction of electromagnetically induced emf is determined by ______ or ______.
Field, current
The _____ is defined as the emf induced in the second coil when a uniform current change of 1 amp/sec takes place in the first coil.
Mutual inductance
Zener diodes are also known for their application in ________.
Voltage regulation
Test your knowledge on diodes and LEDs with this quiz covering topics such as forward bias diode, zener diode, LED characteristics, and applications. Explore concepts like voltage regulators, breakdown diodes, and LED operation modes.
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