Related Questions
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The physical motion resulting from the forces of magnetic fields is called
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Electromotive force in a circuit
A. causes free electrons to flow
B. increases the circuit resistance
C. maintains circuit resistance
D. is needed to make the circuit complete
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The permittivity of a material is given by one of the following formulas.
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What is another name for relative permittivity?
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Mmf in a magnetic circuit corresponds to _____ in an electric circuit
C. Electric Field Intensity
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Which of the following has the least number of valence electrons?
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A test charge means a charge of
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One farad equals
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The temperature coefficient of resistance of conductors is
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The B-H curve of ________ is not a straight line.
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When a current carrying conductor is placed in a magnetic fielda the maximum force will act on the conductor when the conductor is at an angle of _______ to the magnetic field.
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If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa the outstretched thumb will then point the north pole. This is known as
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Who discovered that a current-carrying conductor would move when placed in a magnetic field?
C. Hans Christian Oersted
D. Gustav Robert Kirchhoff
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Which of the following materials has the least hysteresis loop area?
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If the value of 25 a conductor is 1/255 per oCa then the value of 20is
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Which element has four valence electrons?
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Defined as a closed path in which magnetic induction or flux flows
D. Electromagnetic circuit
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The property of a material which opposes the creation of magnetic flux in it
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A length of wire has a resistance of 10 ohms. What is the resistance of a wire of the same material three times as long and twice the cross-sectional area?
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What revolves about the positive nucleus in a definite orbit?
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Electric field intensity at a point is numerically equal to ________ at that point.
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At/m is a unit of
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The electrons in the last orbit of an atom are called _______ electrons.
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What is the cgs unit of magnetomotive force?
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What is the SI unit of conductance?
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Hysteresis is a phenomenon of _________ in a magnetic circuit.
A. setting up constant flux
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If the number of valence electrons of an atom is less than 4a the substance is called
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The net electrical charge in an isolated system remains constant. This is known as
A. Law of conservation of charge
D. Law of conservation of energy
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A t/m is a unit of
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The process by which an emf and hence current is generated or induced in a conductor when there is a change in the magnetic flux linking the conductor is called
A. Electromagnetic induction
D. Electromagnetic interference