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Electromagnetic Field Theory
An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be
0 V.
200 V.
1800 V.
900 V.
0 V.
200 V.
1800 V.
900 V.
Answer
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Related Question
Electromagnetic Field Theory
In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will
increase.
decrease.
remain the same.
initially increase and then decrease.
increase.
decrease.
remain the same.
initially increase and then decrease.
Answer
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Electromagnetic Field Theory
A pure inductor when connected across 220 V, 50 Hz supply consumes 100 W. From the above statement it can be concluded that
the above statement is false.
the inductor is made of thin wire.
the inductor has ferrite core.
the inductor is non linear.
the above statement is false.
the inductor is made of thin wire.
the inductor has ferrite core.
the inductor is non linear.
Answer
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Electromagnetic Field Theory
The minimum height of outer atmosphere is
150 km
100 km
200 km
400 km
150 km
100 km
200 km
400 km
Answer
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Electromagnetic Field Theory
A medium is said to be isotropic when
∈ is a scalar constant.
∈ is zero.
∈ = μσ.
∈ = μ.
∈ is a scalar constant.
∈ is zero.
∈ = μσ.
∈ = μ.
Answer
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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.
Tee
Slotted line
Directional Coupler
Balun
Tee
Slotted line
Directional Coupler
Balun
Answer
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