Related Questions
What is the correct answer?
4
Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as
C. Faraday's first law of electromagnetic induction
D. Faraday's second law of electromagnetic induction
What is the correct answer?
4
The relative permeability of a magnetic material is 10^5. What is its permeability?
What is the correct answer?
4
Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required for iron part of a magnetic circuit?
B. Because air has the highest relative permeability
C. Because air is a conductor of magnetic flux
D. Because air has the lowest relative permeability
What is the correct answer?
4
When the current flowsa the magnetic field ��. conductor is in what direction?
A. The same as the current direction
B. Opposite the current direction
D. In the direction determined by the left hand rule
What is the correct answer?
4
If you hold the conductor with right hand so that the stretched thumb points in the direction of the currenta then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as
A. Left hand cork screw rule
B. Right hand cork screw rule
What is the correct answer?
4
Who discovered the most important electrical effects which is the magnetic effect?
A. Hans Christian Oersted
B. Sir Charles Wheatstone
What is the correct answer?
4
The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
What is the correct answer?
4
The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.
B. Faraday's first law of electromagnetic induction
What is the correct answer?
4
The uncharged particles which have no effect on its atomic charge.
What is the correct answer?
4
The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet
D. Electromagnetic induction
What is the correct answer?
4
Who demonstrated the theory of electromagnetic induction in 1831?
What is the correct answer?
4
The dielectric constant of most materials lies between
What is the correct answer?
4
A substance that attracts pieces iron
What is the correct answer?
4
All matters (gasa liquid and solid) are composed of
What is the correct answer?
4
It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.
What is the correct answer?
4
What is the practical unit of electrical energy?
What is the correct answer?
4
The lagging effect between flux density of the material and the magne
What is the correct answer?
4
The magnetic flux of 2000 lines is how many Maxwells?
What is the correct answer?
4
Permanent magnets can be found in
What is the correct answer?
4
Hydrogen is an example of a _____ material.
What is the correct answer?
4
What determines the atomic number of an element?
B. The number of electrons
C. The number of neutrons
D. The number of neutrons and protons
What is the correct answer?
4
There are how many compounds available in nature?
What is the correct answer?
4
Which of the following materials has permeability slightly less than that of free space?
What is the correct answer?
4
The property of a material which opposes the creation of magnetic flux in it
What is the correct answer?
4
The science of adapting electronics to aerospace flight.
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 temperature coefficient of resistance of insulators is
What is the correct answer?
4
What is the other name for dielectric strength?
What is the correct answer?
4
Electric field intensity is a ________.
What is the correct answer?
4
If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then its resistivity is