Highest flux density exists inside which of the following instruments?

 Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments
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Highest flux density exists inside which of the following instruments? A) Electrodynamic instruments B) Hot wire instruments C) Moving iron instruments D) Moving coil instruments 

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Internal validity refers to which of the following? a. The ability to infer that a casual relationship exists between 2 variables b. The extent to which study results can be generalized to and across populations of persons, settings, and times c. The use of effective measurement instruments in the study d. The ability to generalize the study results to individuals not included in the study

Description : Internal validity refers to which of the following? a. The ability to infer that a casual relationship exists between 2 variables b. The extent to which study results can be generalized to and ... the study d. The ability to generalize the study results to individuals not included in the study

Last Answer : b. The extent to which study results can be generalized to and across populations of persons, settings, and times

Which of the following instruments can be used for measurement of very high value resistances such as

Description : Which of the following instruments can be used for measurement of very high value resistances such as insulation resistance in industries? A) Wheatstone bridge B) Megger C) Ohm-meter D) Resistive potentiometer 

Last Answer : Which of the following instruments can be used for measurement of very high value resistances such as insulation resistance in industries? A) Wheatstone bridge B) Megger C) Ohm-meter D) Resistive potentiometer 

The type of instruments used mainly for standardizing instruments in laboratories is

Description : The type of instruments used mainly for standardizing instruments in laboratories is (a) Indicating instrument (b) Integrating instrument (c) Absolute instrument (d) Recording instrument  

Last Answer : Ans:Option C

Eddy current damping is normally used in the instruments of

Description : Eddy current damping is normally used in the instruments of (a) Induction type (b) Moving iron type (c) Permanent magnet moving coil type (d) Nothing can be said 

Last Answer : Permanent  magnetic  moving  coil  instrument.

Electrostatic type instruments are primarily used as

Description : Electrostatic type instruments are primarily used as 

Last Answer : Voltmeter

The force required to move the pointer in an indicating instruments is

Description : The force required to move the pointer in an indicating instruments is

Last Answer : The force required to move the pointer in an indicating instruments is deflecting force

Horizontally mounted moving iron instruments use

Description : Horizontally mounted moving iron instruments use   (a) Eddy current damping (b) Electromagnetic damping (c) Fluid friction damping (d) Air friction damping

Last Answer : Horizontally mounted moving iron instruments use Air friction damping

Permanent magnet moving coil instruments are used for

Description : Permanent magnet moving coil instruments are used for

Last Answer : PMME are mostly used for measuring voltage and current.

Thermocouple instruments are also known as

Last Answer : Thermocouple instruments are also known as Rectifier instruments.

PMMC type instruments normally use

Last Answer : PMMC type instruments normally use Eddy current damping.

Electrostatic instruments are normally used for

Last Answer :  Electrostatic instruments are normally used for High voltage measurements.

Which of the following instruments can be used to measure AC current only?

Description : Which of the following instruments can be used to measure AC current only? (a) Permanent Magnet Type ammeter(b) Induction type ammeter (c) Moving iron voltmeter(d) Moving iron ammeter

Last Answer : (b) Induction type ammeter

Jewels are used in instruments for the purpose of

Last Answer : Jewels are used in instruments for the purpose of Bearing.

The thermocouple instruments do not have

Last Answer : The thermocouple instruments do not have High degree of measuring accuracy.

In the case of PMMC rectifier type instruments, the deflecting torque is proportional to

Last Answer : In the case of PMMC rectifier type instruments, the deflecting torque is proportional to Average value of AC current.

The electrostatic instruments can be used without serious loss of accuracy upto ......... frequency

Last Answer : The electrostatic instruments can be used without serious loss of accuracy upto 100kHz frequency.

_____ instruments are those which measure the total quantity of electricity delivered in a particular time.

Last Answer : Integrating instruments are those which measure the total quantity of electricity delivered in a particular time.

The use of _____ instruments is merely confined within laboratories as standardising instruments.

Description : The use of _____ instruments is merely confined within laboratories as standardising instruments.

Last Answer : The use of absolute instruments is merely confined within laboratories as standardizing instruments.

Air friction damping is used in the instruments which is:

Last Answer : Air friction damping is used in the instruments which is: Moving iron

Moving iron and PMMC instruments can be distinguished from each other by looking at:

Last Answer : Moving iron and PMMC instruments can be distinguished from each other by looking at: Scale

Commonly used instruments in power system measurement are?

Last Answer : Commonly used instruments in power system measurement are induction.

Operating torques in analogue instruments are?

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The power factor of a single phase load can be calculated if the instruments available are?

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The switch board instruments?

Last Answer : The switch board instruments should be mounted in vertical position.

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Last Answer : In the majority of instruments, damping is provided by eddy currents.

According to application, instruments are classified as?

Last Answer : According to application, instruments are classified as switch board, portable.

Which instruments are those which measure the total quantity of electricity delivered in a particular time?

Last Answer : Integrating instruments are those which measure the total quantity of electricity delivered in a particular time.

The use of which instruments is merely confined within laboratories as standardizing instruments?

Last Answer : The use of absolute instruments is merely confined within laboratories as standardizing instruments.

What do you mean by secondary instruments?

Description : What do you mean by secondary instruments?

Last Answer : The instruments which will give the direct readings are called secondary instruments

To measure the flux, devices used are based on

Last Answer :  To measure the flux, devices used are based on Hall effect.

A moving-coil permanent-magnet instrument can be used as flux-meter?

Last Answer : A moving-coil permanent-magnet instrument can be used as flux-meter by eliminating the control springs.

Maximum density of water exists at (a) 0°C (b) 4°C (c) 40°C (d) 100°C

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Last Answer : (b) 4°C

In quantum chemistry, a nodal surface: w) gives 99 percent contour surface for an orbital x) exists for a 1s orbital y) has quantum number l = 1 z) is an orbital surface on which the probability density is zero

Description : In quantum chemistry, a nodal surface: w) gives 99 percent contour surface for an orbital x) exists for a 1s orbital y) has quantum number l = 1 z) is an orbital surface on which the probability density is zero

Last Answer : ANSWER: Z -- IS AN ORBITAL SURFACE ON WHICH THE PROBABILITY DENSITY IS ZERO 

5) An iron ring of mean circumference of 80 cm is uniformly wound with 500 turns of wire. Calculate the value of flux density that a current of 1 A would produce in the ring. Assume relative permeability 1400.

Description : Please ripley me due to emergency

Last Answer : To calculate the flux density in the ring, you need to use the following formula: B = (μ * I * N) / (2 * π * r) where: B is the flux density in the ring (in teslas) μ is the relative permeability ... 2 * π * 0.127 m) = 0.53 T So the flux density in the ring would be approximately 0.53 teslas.

Materials that retain a large part of their magnetization, after the magnetizing force is removed, are said to have _____________. A. low hysteresis loss B. high flux density C. high permanence D. high permeability

Description : Materials that retain a large part of their magnetization, after the magnetizing force is removed, are said to have _____________. A. low hysteresis loss B. high flux density C. high permanence D. high permeability

Last Answer : Answer: C

What are the factors affecting the selection of Maximum flux density?

Description : What are the factors affecting the selection of Maximum flux density?

Last Answer : 1. Net core weight: Higher the flux density lesser net weight of core. 2.Saving in copper:Higher the flux density lesser mean turn of windings. 3.Overall economy: Higher the flux ... High Flux density results in high losses and hence efficiency decreases 8.Hence high temperature rise and noise

What happens if the air gap flux density in an induction motor increases?

Description : What happens if the air gap flux density in an induction motor increases?

Last Answer : The increase in air gap flux increases iron loss and hence efficiency decreases.

Which part of induction motor has the maximum flux density? What is the maximum flux density in that part?

Description : Which part of induction motor has the maximum flux density? What is the maximum flux density in that part?

Last Answer : The teeth of the stator and rotor core will have maximum flux density. The maximum value of flux density in the teeth is 1.7 wb/m

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

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)

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

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

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