Under ordinary conditionsa a body is considered
positively charged
neutral
negatively charged
stable
Correct Answer :
B. neutral
Related Questions
Which element has four valence electrons?
Conductor
Insulator
Semiconductor
Semi- insulator
Magnetic fields do not interact with
Moving permanent magnets
Stationary permanent magnets
Moving electric charges
Stationary electric charges
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.
Ewing's theory of ferromagnetism
Oersted's ferromagnetism theory
Maxwell's magnetic theory
Ampere's circuital law
If the relative permittivity of a material is 10a then its permittivity is
4 × 10^7F/m
4 × 10^-6 F/m
8.854× 10^-11 F/m
8.854 × 10^-12 F/m
A test charge means a charge of
-1 C
1 electron
+1 C
-20 C
A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 × 10^-6
5 × 10^-6
500 × 10^-6
500 × 10^-5
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becomes four times
becomes sixteen times
remains the same
becomes two times
A t/m is a unit of
Mmf
Emf
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Magnetizing force
Which of the following is a diamagnetic material?
Aluminum
Silver
Air
Cobalt
There are how many compounds available in nature?
300a000
Unlimited
The force acting on a unit n- pole placed at that point is called
Magnetic field intensity
Electric field intensity
Electromagnetic field intensity
Intensity magnetization
The phenomenon by which a subtracts pieces of iron
Magnetism
Electromagnetism
Naturalism
Materialism
Gases whose particles are charged are known as
Conductors
Insulators
Gaseous Conductors
Plasma
The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called
Magnetic field
Electric field
Electromagnetic field
Free Space Field
A positively charged body has
deficit of electrons
excess of neutrons
excess of electrons
deficit of protons
Whenever a conductor cuts magnetic fluxa an emf is induced in it. This is known as
Coulomb's law
Joule's law
Faraday's law
Ohm's law
The science of adapting electronics to aerospace flight.
Avionics
Aerotronics
Aerodynamics
Astrionics
The potential at a point due to a charge is 15 V. If the distance is times, the potential at the point will be
5 V
18 V
45 V
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One coulomb of charge consists of ________ electrons.
624× 10^16
62.4 × 10^16
6.24 × 10^16
0.624 × 10^16
Who developed the electromagnetic theory of light in 1862?
Heinrich Rudolf Hertz
Wilhelm Rontgen
James Clerk Maxwell
Andre Ampere
The reluctance of the magnetic circuit is ________ relative permeability of the material comprising the circuit.
directly proportional to
inversely proportional to
independent of
dependent of
What is the relative permittivity of air?
8.854 × 10^-12
4 × 10^7
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DE
E/D
D^2/E
D/E
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5 Wb
0.5 Tesia of flux density
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Faraday's law
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Faraday's first law of electromagnetic induction
Coulomb's first law
Coulomb's second law
Another term for corona discharge.
Lightning
Sparking
Aurora
Corona Effect
A negative ion results when an atom gains an additional
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Neutron
Atom
Flux linkages equals
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Flux times number of turns times area of core
Flux times number of turns times length of core
Flux times number of turns