Related Questions
What is the correct answer?
4
A test charge means a charge of
What is the correct answer?
4
Electric field intensity at a point is numerically equal to ________ at that point.
What is the correct answer?
4
A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.
What is the correct answer?
4
A one cubic cm of copper has how many free electrons at room temperature?
What is the correct answer?
4
The amount of magnetizing force to counter balance the resid magnetic material is referred to as
What is the correct answer?
4
Back emf refers to the
A. Current equal to the applied emf
C. Current opposing the applied emf
D. Voltage opposing the applied emf
What is the correct answer?
4
Electric potential is a _______ quantity.
What is the correct answer?
4
Formed when there exist distant electronic interactions between (opposite) charges present in the neighboring atoms or molecules.
What is the correct answer?
4
______ is an electromagnet with its core in the form of a close magnetic ring.
What is the correct answer?
4
The force between two magnetic poles is _______ their pole strengths.
A. directly proportional to
C. inversely proportional to
What is the correct answer?
4
Theory of ferromagnetic phenomena which assumes each atom is a permanent magnet which can turn freely about its center under the influence of applied field and other magnets.
A. Ewing's theory of ferromagnetism
B. Oersted's ferromagnetism theory
C. Maxwell's magnetic theory
D. Ampere's circuital law
What is the correct answer?
4
Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume of the unit cell and is used to measure the compactness of a crystal.
A. Atomic packing factor (APF)
B. Ionic Packing Ratio (IPR)
C. Atomic compacting factor (ACF)
D. Ionic compacting ratio (ICR)
What is the correct answer?
4
A magnetizing force of 1000 AT/m will produce a flux density of __________ i
What is the correct answer?
4
Who developed the electromagnetic theory of light in 1862?
What is the correct answer?
4
The quantity of magnetism retained by a magnetic material after withdrawal of the magnetizing force is called
What is the correct answer?
4
The magnetic flux of 2000 lines is how many Maxwells?
What is the correct answer?
4
If the length and area of cross-section of a wire are doubleda then its resistance
What is the correct answer?
4
The core of a transformer heats up when its primary is fed from an ac source because of
What is the correct answer?
4
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
What is the correct answer?
4
Magnetic field intensity is a ________ quantity.
What is the correct answer?
4
The unit of electrical energy is
What is the correct answer?
4
The temperature coefficient of resistance of conductors is
What is the correct answer?
4
What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5 x 10^-3 m^2?
What is the correct answer?
4
Which of the following has the highest permeability?
What is the correct answer?
4
Defined as the flux density produced in it due to its own induced magnetism
A. Magnetic field intensity
B. Electric field intensity
C. Electromagnetic field intensity
D. Intensity magnetization
What is the correct answer?
4
What is the measure of the density and sign of the electric charge at a point relative to that at some time?
What is the correct answer?
4
If the value of 25 of a conductor is 1/230 per oCa then the value of 0is
What is the correct answer?
4
Three charges of +5 Ca -6 C and +9 C are placed inside a sphere. What is the total flux passing through the surface of sphere?
What is the correct answer?
4
A 200-watt lamp working for 24 hours will consume approximately _____ units.
What is the correct answer?
4
If the value of 25 a conductor is 1/255 per oCa then the value of 20is