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Electromagnetic Field Theory
The coils having self inductance of 10 mH and 15 mH have an effective inductance of 40 mH, when connected in series aiding. What will be the equivalent inductance if we connect then in series opposing?
5 mH.
20 mH.
10 mH.
0 mH.
5 mH.
20 mH.
10 mH.
0 mH.
Answer
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Related Question
Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of
neutrons.
protons.
electrons.
electric field.
neutrons.
protons.
electrons.
electric field.
Answer
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Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is
Due to transformer only.
Due to both rotating and transformer action.
Zero.
Due to rotating only.
Due to transformer only.
Due to both rotating and transformer action.
Zero.
Due to rotating only.
Answer
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Electromagnetic Field Theory
Radiation intensity in a given direction is the
Power radiated per square metre
None of these
Energy radiated per square metre
Power radiated per unit solid angle in that direction
Power radiated per square metre
None of these
Energy radiated per square metre
Power radiated per unit solid angle in that direction
Answer
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Electromagnetic Field Theory
Which of following is not a unit of flux?
Weber.
Maxwell.
Telsa.
All of above.
Weber.
Maxwell.
Telsa.
All of above.
Answer
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Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere
Q/(4 π εo r3).
Qr/(4 π εo R3).
3 Qr/(4 π εo R3).
QR/(4π εo r3).
Q/(4 π εo r3).
Qr/(4 π εo R3).
3 Qr/(4 π εo R3).
QR/(4π εo r3).
Answer
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