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4

What is the SI unit of conductance?

A. Siemens

B. Mhos

C. Ohms

D. 1/Ohms

Correct Answer :

A. Siemens


Related Questions

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The magnetic field of a bar magnet most closely resembles the magnetic field of

A. a horseshoe magnet

B. a straight current- carrying wire

C. a stream of electrons moving parallel to one another

D. a current- carrying wire loop

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Which of the following is a natural magnet?

A. Steel

B. Magnesia

C. Lodestone

D. S oft iron

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The phenomenon by which a subtracts pieces of iron

A. Magnetism

B. Electromagnetism

C. Naturalism

D. Materialism

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If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is

A. 8 × 10^6 N

B. 9 × 10 ^9 N

C. 10^6 N

D. 5 × 10^6 N

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A factor used to correct for the electrostatic forces of the more distant ions in an ionic solid.

A. Avogadro's number

B. Planck's constant

C. Boltzmann's constant

D. Madelung constant

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The permeability of permalloy is

A. Very much greater than permeability of air

B. Slightly greater than permeability of air

C. Slightly less than permeability of air

D. Equal to the permeability of air

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Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons

A. North pole

B. South pole

C. Unit pole

D. Magnetic pole

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A negatively charge body has

A. deficit of electrons

B. excess of protons

C. excess of electrons

D. deficit of neutrons

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The magnetic field around the conductor is determined by the

A. Size of the conductor

B. Amount of current

C. Current divided by the resistance

D. Resistance divided by the current

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Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions

A. Ionic bond

B. Covalent Bond

C. Electrostatic Bond

D. Metallic bond

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One of the solid structures in which the position of the atoms or ions are predetermined

A. Crystalline solid

B. Amorphous solid

C. Polycrystalline solid

D. Poly amorphous solid

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The resistance of a material is ____________ its area of cross-section.

A. directly proportional

B. independent of

C. inversely proportional to

D. equal to

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The B-H curve for ________ is a straight line passing through the origin.

A. cobalt

B. air

C. hardened steel

D. soft iron

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If the value of 25 a conductor is 1/255 per oCa then the value of 20is

A. 1/300 per oC

B. 1/250 peroC

C. 1/230 per oC

D. 1/260 per oC

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The simplest type of atom to exist is the ______ atom.

A. Helium

B. Hydrogen

C. Boron

D. Oxygen

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Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?

A. Luigi Galvani

B. Hans Christian Oersted

C. Andre Ampere

D. Charles Coulomb

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One ampere- turn is equivalent to _____ gilberts

A.

B.

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Refers to the magnetic lines

A. Flux

B. Hysteresis

C. Current

D. Magnetomotive force

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One that has magnetic poles produced by internal atomic structure with no external current necessary

A. Diamagnetic

B. Permanent magnets

C. Paramagnetic

D. Electromagnetic

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The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given by

A. 0 0= c^2

B. 0 0= c

C. 1/ 0 0= c

D. 1/ 0 0= c^2

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The unit of flux density is

A. Wb/m

B. Tesla

C. At/m

D. N/Wb

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A negative ion results when an atom gains an additional

A. Electron

B. Proton

C. Neutron

D. Atom

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Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as

A. Joule's Law

B. Coulomb's Law

C. Faraday's first law of electromagnetic induction

D. Faraday's second law of electromagnetic induction

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The temperature coefficient of resistance of eureka is

A. p ositive

B. negative

C. almost zero

D. i nfinite

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A magnetic material losses its ferromagnetic properties at a point called

A. Curie temperature

B. Inferred absolute temperature

C. Room temperature

D. Absolute temperature

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The energy stored in an electrostatic field or electromagnetic field is called

A. Electromagnetic energy

B. Kinetic energy

C. Potential energy

D. R est energy

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Which of the following is a vector quantity?

A. Magnetic potential

B. Magnetic field intensity

C. Magnetic permeability

D. F lux density

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Paramagnetic substance has a relative permeability of

A. Slightly less than one

B. Equal to one

C. Slightly equal to one

D. Very much greater than one

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The uncharged particles which have no effect on its atomic charge.

A. Nucleons

B. Electrons

C. Protons

D. Neutrons

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The point in a magnet where the intensity of magnetic lines of force is maximum

A. Magnetic pole

B. South pole

C. North pole

D. Unit pole