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MCQ
BASIC ELECTRONICS
CONTROL SYSTEM ENGINEERING
DIGITAL ELECTRONICS
ELECTRICAL CIRCUIT ANALYSIS
ELECTRICAL ENERGY CONSERVATION AND AUDITING
ELECTRICAL ENGINEERING MATERIALS
ELECTRICAL MACHINES
ELECTRICAL WIRING
ELECTROMAGNETICS
MEASUREMENT & INSTRUMENTATION
MICROPROCESSOR AND MICROCONTROLLER INTERFACING
POWER ELECTRONICS & DRIVES
POWER SYSTEM
SIGNALS & SYSTEMS
UTILIZATION OF ELECTRICAL ENERGY
ELECTRICAL ENGINEERING MATERIALS
Q1.
A ferrite core has less eddy current loss than an iron core, because ferrites have_________.
Low Resistance
High Resistance
Low Permeability
High Permeability
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Solution
Q2.
Mercury as an electric contact material is
a liquid
a metal
a metal liquid
a gas
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Solution
Q3.
The property characteristic of ferroelectric materials is
Dielectric relaxation
Dielectric breakdown
Spontaneous polarization
Spontaneous magnetization
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Solution
Q4.
In semiconductor strain gauges, what happens when a tensile strain is applied?
Resistance increases in N-type of materials
Resistance increases in P-type of materials
Resistance increases in both P-type and N-type of materials
Resistance decreases in both P-type and N-type of materials
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Solution
Q5.
When a ferromagnetic substance is magnetized, there are small changes in dimensions. The phenomenon is called
Hysteresis
Magnetostriction
Diamagnetism
Dipol relaxation
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Solution
Q6.
According to free electron theory, electron in a metal are subjected to
Constant potential
Sinusoidal potential
Square wave potential
Non-periodic potential
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Solution
Q7.
The material that are weakly magnetized in the direction opposite to the applied magnetic field are called__________.
diamagnetic materials
paramagnetic materials
ferromagnetic materials
non-magnetic materials
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Solution
Q8.
Magnetically hard materials do not possess which of the following characteristics?
High retentivity
High coercivity
Strong magnetic reluctance
Zero differential permeability
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Solution
Q9.
The soft magnetic material have ___________.
no energy loss
narrow hysteresis loop
large hysteresis loop
no hysteresis loop
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Solution
Q10.
On which of the following factors does hysteresis loss not depend?
Magnetic field intensity
Frequency of the field
Volume of the material
Neal temperature
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Solution
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