The stray line of magnetic flux is defined as

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The stray line of magnetic flux is defined as a line of magnetic flux which does not follow the designed path.
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The purpose of an impressed current cathodic protection system aboard ship is to _______________. A. prevent corrosion of the hull, propeller, rudder and line shafting B. neutralize the vessel's stray magnetic fields which would interfere with radar C. protect engine room and deck machinery from oxidation in the presence of salt air D. maintain a minimum constant alternator load to prevent overheating

Description : The purpose of an impressed current cathodic protection system aboard ship is to _______________. A. prevent corrosion of the hull, propeller, rudder and line shafting B. neutralize the vessel's ... the presence of salt air D. maintain a minimum constant alternator load to prevent overheating

Last Answer : Answer: A

The magnetization is defined by the ratio of a) Magnetic moment to area b) Magnetic moment to volume c) Magnetic flux density to area d) Magnetic flux density to volume

Description : The magnetization is defined by the ratio of a) Magnetic moment to area b) Magnetic moment to volume c) Magnetic flux density to area d) Magnetic flux density to volume

Last Answer : b) Magnetic moment to volume

The unit of flux is the same as that of

Description : The unit of flux is the same as that of

Last Answer : The unit of flux is the same as that of pole strength.

When a solid-state component of an electronic circuit is mounted to a metallic mass, the general purpose of that mass is to ____________. A. prevent vibration damage to delicate components B. prevent mechanical damage to solid-state components C. dissipate stray magnetic currents D. act as a heat sink

Description : When a solid-state component of an electronic circuit is mounted to a metallic mass, the general purpose of that mass is to ____________. A. prevent vibration damage to delicate components B. prevent ... damage to solid-state components C. dissipate stray magnetic currents D. act as a heat sink

Last Answer : Answer: D

The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields (a) meter is surrounded by strong magnetic fields (b) a soft iron shielding is used (c) a plastic shielding is provided (d) a shielding of anon-magnetic material is used

Description : The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields (a) meter is surrounded by strong magnetic fields (b) a soft ... is used (c) a plastic shielding is provided (d) a shielding of anon-magnetic material is used

Last Answer : (b) a soft iron shielding is used

What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.

Description : What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.

Last Answer : 1. Error due to stray magnetic fields-   Main magnetic field gets disturbed by external magnetic fields known as stray magnetic fields.  2. Compensation technique   To avoid this error, ... resistance alloy having a negligible resistance temp coefficient in the ratio of 1:10 for pressure coil 

The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the

Description : The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are  A) Perpendicular B) Parallel C) Inclined at 60" D) Inclined at 30°

Last Answer : The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are Parallel 

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic

Description : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

Last Answer : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

To avoid the effect of stray magnetic field in A.C. bridges we can use?

Last Answer : To avoid the effect of stray magnetic field in A.C. bridges we can use magnetic screening.

The line integral of the magnetic field intensity is the a) Current density b) Current c) Magnetic flux density d) Magnetic moment

Description : The line integral of the magnetic field intensity is the a) Current density b) Current c) Magnetic flux density d) Magnetic moment

Last Answer : b) Current

The magnetic materials exhibit the property of magnetisation because of

Last Answer : The magnetic materials exhibit the property of magnetisation because of spin of nucleus.

How does the magnetic compass needle behave in a magnetic field ?

Last Answer : It assures a position which follows a line of magnetic flux

The magnetic reluctance of a material

Last Answer : The magnetic reluctance of a material decreases with increasing cross-sectional area of the material.

The uniform magnetic field is

Last Answer : The uniform magnetic field is the field in which all lines of magnetic flux are parallel and equidistant.

Magnetic moment is a

Last Answer : Magnetic moment is a vector quantity.

A rectangular magnet of magnetic moment M is cut into two piece ...

Description : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

Last Answer : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be M/2.

If a copper disc is rotated rapidly below a freely suspended magnetic...

Description : If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity

Last Answer : If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity less than that of disc and in the same direction.

When an iron piece is placed in a magnetic field

Last Answer :  When an iron piece is placed in a magnetic field the magnetic lines of force will bend away from their usual paths in order to pass through the piece.

A material which is slightly repelled by a magnetic field is known as

Last Answer : A material which is slightly repelled by a magnetic field is known as diamagnetic material.

The direction of magnetic lines of force is

Last Answer : The direction of magnetic lines of force is from north pole to south pole.

A magnetic field exists around

Last Answer : A magnetic field exists around moving charges.

______ is most commonly used for making magnetic recording tape.

Description : ______ is most commonly used for making magnetic recording tape.

Last Answer : Ferric oxide is most commonly used for making magnetic recording tape.

Mass transfer co-efficient is defined as (A) Flux = Co-efficient/concentration difference (B) Co-efficient = Flux/concentration difference (C) Flux=concentration difference/coefficient (D) None of these

Description : Mass transfer co-efficient is defined as (A) Flux = Co-efficient/concentration difference (B) Co-efficient = Flux/concentration difference (C) Flux=concentration difference/coefficient (D) None of these

Last Answer : (B) Co-efficient = Flux/concentration difference

Flux density is defined by A. FIL B. F⁄(IL) C. IL D. I⁄(FL)

Description : Flux density is defined by A. FIL B. F⁄(IL) C. IL D. I⁄(FL)

Last Answer : F⁄(IL)

Heat flux, as defined in heat flow is analogous to __________ in electricity flow. (A) Current (B) Voltage (C) Resistance (D) None of these

Description : Heat flux, as defined in heat flow is analogous to __________ in electricity flow. (A) Current (B) Voltage (C) Resistance (D) None of these

Last Answer : (A) Current

iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel to the magnetic lines of force. Then the coil willa) rotate to maximize the magnetic flux through its plane. b)rotate to minimize the magnetic flux through its plane.c) not experience any torque since the magnetic flux through its plane is zero.d) experience the constant torque equal to NBIA

Description : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel to the magnetic lines of force. Then the coil willa) rotate to maximize the magnetic flux through ... since the magnetic flux through its plane is zero.d) experience the constant torque equal to NBIA

Last Answer : iv) A rectangular coil free to rotate is placed in uniform magnetic field with its plane parallel ... d) experience the constant torque equal to NBIA

Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ?

Description : Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ?

Last Answer : Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ? A. B. C. D.

Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure. `otimes` direction indicates a direction perpendicular

Description : Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure. `otimes` direction indicates a direction perpendicular

Last Answer : Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure ... to paper inwards. Match the following table.

Match the following `{:(,,"Table-1",,"Table-2"),(,(A),L,(P),[M^(0)L^(0)T^(-2)]),(,(B),"Magnetic Flux",(Q),[ML^(2)T^(-2)A^(-1)]),(,(C),LC,(R),[ML^(2)T^

Description : Match the following `{:(,,"Table-1",,"Table-2"),(,(A),L,(P),[M^(0)L^(0)T^(-2)]),(,(B),"Magnetic Flux",(Q),[ML^(2)T^(-2)A^(-1)]),(,(C),LC,(R),[ML^(2)T^

Last Answer : Match the following `{:(,,"Table-1",,"Table-2"),(,(A),L,(P),[M^(0)L^(0)T^(-2)]),(,(B),"Magnetic Flux",(Q) ... (-2)A^(-2)]),(,(D),CR^(2),(S),"None"):}`

S.I. unit of Magnetic flux is – (1) weber (2) weber/m (3) weber/m⁴ (4) weber-m²

Description : S.I. unit of Magnetic flux is – (1) weber (2) weber/m (3) weber/m⁴ (4) weber-m²

Last Answer : (1) weber Explanation: The SI unit of magnetic flux is the Weber (Wb) (in derived units: volt-seconds). It is the magnetic flux that, linking a circuit of one turn, would produce in it ... second. It is named after the German physicist Wilhelm Eduard Weber. The CGS unit of magnetic flux is Maxwell.

Tesla is a unit of magnetic – (1) flux (2) induction (3) moment (4) field

Description : Tesla is a unit of magnetic – (1) flux (2) induction (3) moment (4) field

Last Answer : (4) field Explanation: The tesla (symbol T) is the SI derived unit used to measure magnetic fields. Testa can be measured in different ways; for example, one tesla is equal to one Weber per ... Measures (CGPM). It was named in honor of the physicist electrical engineer, and inventor, Nikola Tesla.

Which physical quantity is measured in ‘siemens’? (1) Electric potential (2) Electrical conductance (3) Magnetic flux (4) Refractive index

Description : Which physical quantity is measured in ‘siemens’? (1) Electric potential (2) Electrical conductance (3) Magnetic flux (4) Refractive index

Last Answer : (2) Electrical conductance Explanation: The Siemens is the unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI).

The rotor of a synchronous motor operates in synchronism with the rotating field because ______________. A. of the amortisseur windings B. the rotor is magnetically locked into step with the rotating magnetic field by the excitation current C. the field strength varies directly with rotor slip D. the stator flux rotates in the opposite direction

Description : The rotor of a synchronous motor operates in synchronism with the rotating field because ______________. A. of the amortisseur windings B. the rotor is magnetically locked into step with the ... field strength varies directly with rotor slip D. the stator flux rotates in the opposite direction

Last Answer : Answer: B

A shading coil used in an AC magnetic controller, functions to _____________. A. reduce vibration and noise in the contactor B. prevent flux buildup in the operating coil C. eliminate arcing when the contacts close D. energize the operating coil and 'pull in' the contacts

Description : A shading coil used in an AC magnetic controller, functions to _____________. A. reduce vibration and noise in the contactor B. prevent flux buildup in the operating coil C. eliminate arcing when the contacts close D. energize the operating coil and 'pull in' the contacts

Last Answer : Answer: A

A spot on the sun’s visible surface where the magnetic flux lines converge? A. Sunspot B. Filament C. Solar spot D. Prominence

Description : A spot on the sun’s visible surface where the magnetic flux lines converge? A. Sunspot B. Filament C. Solar spot D. Prominence

Last Answer : A. Sunspot

An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Description : An advantage of optic fiber rejecting an induced noise signals from magnetic field or solar storms flux. A. Electric hazard B. Cross talk C. Immunity to noise D. Shielding

Last Answer : C. Immunity to noise

If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is A. thrice the Earth's magnetic flux density B. four times the Earth's magnetic flux density C. five times the Earth's magnetic flux density D. twice the Earth's magnetic flux density

Description : If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is A. thrice the Earth's magnetic flux density B. four times the Earth ... C. five times the Earth's magnetic flux density D. twice the Earth's magnetic flux density

Last Answer : twice the Earth's magnetic flux density

If the magnetic flux density and current are at right angles, then component of force acting on the conductor is A. BIL cosθ B. BIL sinθ C. BIL tanθ D. BL sinθ

Description : If the magnetic flux density and current are at right angles, then component of force acting on the conductor is A. BIL cosθ B. BIL sinθ C. BIL tanθ D. BL sinθ

Last Answer : BIL sinθ

Strength of magnetic field is known as A. flux B. density C. magnetic strength D. magnetic flux density

Description : Strength of magnetic field is known as A. flux B. density C. magnetic strength D. magnetic flux density

Last Answer : magnetic strength

When field is parallel to plane of area, magnetic flux through coil isA. zeroB. infiniteC. 2D. 5

Description : When field is parallel to plane of area, magnetic flux through coil isA. zero B. infinite C. 2 D. 5

Last Answer : zero

E.M.F for a coil depends upon A. the cross sectional area B. no. of turns of wire C. the magnitude of magnetic flux density D. all of above

Description : E.M.F for a coil depends upon A. the cross sectional area B. no. of turns of wire C. the magnitude of magnetic flux density D. all of above

Last Answer : all of above

For a straight wire, induced current depends uponA. the speed of movement of wire B. the length of wire C. the magnitude of magnetic flux density D. all of above

Description : For a straight wire, induced current depends uponA. the speed of movement of wire B. the length of wire C. the magnitude of magnetic flux density D. all of above

Last Answer : all of above

In transformer, the core is made up of soft iron in order to pass the maximum A. flux B. current C. magnetic flux D. voltage

Description : In transformer, the core is made up of soft iron in order to pass the maximum A. flux B. current C. magnetic flux D. voltage

Last Answer : magnetic flux

Magnitude of induced e.m.f is proportional to A. rate of change of current B. rate of change of voltage C. rate of change of magnetic flux linkage D. rate of change of resistance

Description : Magnitude of induced e.m.f is proportional to A. rate of change of current B. rate of change of voltage C. rate of change of magnetic flux linkage D. rate of change of resistance

Last Answer : rate of change of magnetic flux linkage

Total number of magnetic field lines passing through an area is called A. magnetic flux density B. magnetic flux C. e.m.f D. voltage

Description : Total number of magnetic field lines passing through an area is called A. magnetic flux density B. magnetic flux C. e.m.f D. voltage

Last Answer : magnetic flux

A straight wire of length 0.20 m moves at a steady speed of 3.0 m s-1 at right angles to the magnetic field of flux density 0.10 T. The e.m.f induced across ends of wire is A. 0.5 V B. 0.06 V C. 0.05 V D. 0.04 V

Description : A straight wire of length 0.20 m moves at a steady speed of 3.0 m s-1 at right angles to the magnetic field of flux density 0.10 T. The e.m.f induced across ends of wire is A. 0.5 V B. 0.06 V C. 0.05 V D. 0.04 V

Last Answer : 0.06 V

E.M.F can be induced in a circuit by A. changing magnetic flux density B. changing area of circuit C. changing the angle D. all of above

Description : E.M.F can be induced in a circuit by A. changing magnetic flux density B. changing area of circuit C. changing the angle D. all of above

Last Answer : all of above

Force on a moving charge in a uniform magnetic field depends uponA. magnetic flux density B. the charge on the particle C. the speed of particle D. all of above

Description : Force on a moving charge in a uniform magnetic field depends uponA. magnetic flux density B. the charge on the particle C. the speed of particle D. all of above

Last Answer : all of above

Hall voltage is directly proportional to A. current B. electric field C. magnetic flux density D. all of above

Description : Hall voltage is directly proportional to A. current B. electric field C. magnetic flux density D. all of above

Last Answer : magnetic flux density

An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm

Description : An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of 8 × 106 m s-1, the radius of circular path followed by electron is A. 3.8 cm B. 3.7 cm C. 3.6 cm D. 3.5 cm

Last Answer : 3.8 cm