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Electromagnetic Field Theory
The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of
cross-sectional area of conductor.
current flowing through the conductor.
length of conductor.
flux density.
cross-sectional area of conductor.
current flowing through the conductor.
length of conductor.
flux density.
Answer
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Related Question
Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is
150.
600.
300.
450.
150.
600.
300.
450.
Answer
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Electromagnetic Field Theory
Gradient of scalar field is expressed as
Circulation of a vector field per unit area as the area tends to zero.
Maximum rate of increase of scalar function at a point.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Gradient of divergence of a vector field minus the curl of the vector field.
Circulation of a vector field per unit area as the area tends to zero.
Maximum rate of increase of scalar function at a point.
Outward flux of a vector field per unit volume as the volume about the point tends to zero.
Gradient of divergence of a vector field minus the curl of the vector field.
Answer
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Electromagnetic Field Theory
A waveguide operated below cut off frequency can be used as
An isolator
Phase shifter
None
An attenuator
An isolator
Phase shifter
None
An attenuator
Answer
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Electromagnetic Field Theory
The Biot-savarts law is a general modification of
Faradays law.
Amperes law.
Lenzs law.
Kirchhoffs law.
Faradays law.
Amperes law.
Lenzs law.
Kirchhoffs law.
Answer
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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called
static induced emf.
virtually induced emf.
None of these
dynamically induced emf.
static induced emf.
virtually induced emf.
None of these
dynamically induced emf.
Answer
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