Is there a test to prove that an EMF (electro-magnetic field) has damaged human body?

Is there a test to prove that an EMF (electro-magnetic field) has damaged human body?
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So you believe that EMF radiation does physiologic damage to the human body? If so, what makes you think this?
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A current carrying conductor is associated with – (1) a magnetic field (2) an electric field (3) an electro-magnetic field (4) an electrostatic field

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Last Answer : (3) an electro-magnetic field Explanation: A current carrying conductor, such as a metal wire, will produce a magnetic field around it because of the motion of charge within the wire itself. This motion produces or sets up a magnetic field around the wire in the form of concentric circles.

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Last Answer : ANSWER: Z -- 90 DEGREES

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State Faraday’s first law of electro-magnetic induction.

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Last Answer : (B) 0.5 to 50

Which technology is used in Compact disks ? 1) Mechanical 2) Electrical 3) Electro Magnetic 4) Laser

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Last Answer : (a) Electrical conductivity of the water sample

The branch of physics that deals with the investigation of wavelengths of electro magnetic radiation emitted or absorbed by atoms is known as a) spectroscopy b) astroscopy c) radioscopy d) stereoscopy

Description : The branch of physics that deals with the investigation of wavelengths of electro magnetic radiation emitted or absorbed by atoms is known as a) spectroscopy b) astroscopy c) radioscopy d) stereoscopy

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Which region of the electro-magnetic spectrum will cause sunburns? w) ultraviolet x) infrared y) visible

Description : Which region of the electro-magnetic spectrum will cause sunburns? w) ultraviolet x) infrared y) visible

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Explain the electro-magnetic flow meter with neat sketch and write it’s application.

Description : Explain the electro-magnetic flow meter with neat sketch and write it’s application. 

Last Answer : Electromagnetic flow meter: Principle of Operation: 1. The operation of an Electro-magnetic flow meter is based upon Faraday's Law, which states that the voltage induced across any conductor as it ... rates. It can be also used for measurement of flow rate of slurries, greasy materials.

Electro Magnetic Induction

Description : Electro Magnetic Induction

Last Answer : Electro Magnetic Induction

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Description : As a result of electric current a magnetic field is created around it , from whose test can it be realized ?

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The energy in a magnetic material is due to which process? a) Emf b) Magnetization c) Magnetostriction d) Polarization

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Which of the following will produce an induced emf: a. Changing area of coil b. Changing magnetic flux c. changing orientation of coil d. all of them

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Description : The current flowing in a coil due to induced emf depends upon: a. shape of coil b. resistance of coil c. area of coil d. magnetic flux

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When a conductor cuts magnetic flux, an emf is induced in the conductor. This is known as...

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A three-phase, induction-type motor experiences an open in one phase. Which of the listed automatic protective devices will prevent the machine from being damaged? A. Overspeed trip B. Thermal overload relay C. Three-pole safety switch D. Magnetic blowout coil

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Electro-static precipitator is used to control (1) Chemical Pollutants (2) Radio-active Pollutants (3) Water Pollutants (4) Air Pollutants

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The following are true about electro-retinography? a. flicker ERG can be used to test cone function b. ERG is normal in patient with macular degeneration c. the a-wave of ERG is produced by the ganglion cells d. the b-wave is produced by the photoreceptor cell

Description : The following are true about electro-retinography? a. flicker ERG can be used to test cone function b. ERG is normal in patient with macular degeneration c. the a-wave of ERG is produced by the ganglion cells d. the b-wave is produced by the photoreceptor cell

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Color test of water is done with an instrument called (A) Tintometer (B) Colorimeter (C) Electro-chemical cell (D) Turbidimeter

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Which of the following types of DC motors has its field connected in parallel with its armature? A. Counter EMF B. Shunt C. Salient pole D. Series

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According to Faraday’s law, EMF stands for a) Electromagnetic field b) Electromagnetic force c) Electromagnetic friction d) Electromotive force

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An emf is generated in a conductor when the conductor is cut by what type of field?

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In the plane of AC generator coil is parallel to the field, then emf induced in coil is: a. maximum b. minimum c. zero d. intermediate

Description : In the plane of AC generator coil is parallel to the field, then emf induced in coil is: a. maximum b. minimum c. zero d. intermediate

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In the plane of the A.C generator coil is perpendicular to the field, then induced emf in the coil is: a. Maximum b. minimum c. zero d. intermediate value

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Last Answer : b. minimum

How do I work out what has the smallest EMF?

Description : How do I work out what has the smallest EMF?

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Which one of the following is the advantage of connecting two dry cells in parallel instead of in series? Is it because the parallel arrangement: w) gives twice the EMF of one dry cell x) has no internal resistance y) generates heat in an external circuit half as fast as would a single cell z) has half the internal resistance of a single cell

Description : Which one of the following is the advantage of connecting two dry cells in parallel instead of in series? Is it because the parallel arrangement: w) gives twice the EMF of one dry cell x) has no ... circuit half as fast as would a single cell z) has half the internal resistance of a single cell

Last Answer : ANSWER: Z -- HAS HALF THE INTERNAL RESISTANCE OF A SINGLE CELL 

The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy

Description : The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy

Last Answer : ANSWER: X -- INTERNAL RESISTANCE

The potential drop between the terminals of a battery is equal to the battery's EMF when: w) no current is drawn from the battery x) a very large current is drawn from the battery y) the internal resistance of the battery is very large z) the resistance in the external circuit is small

Description : The potential drop between the terminals of a battery is equal to the battery's EMF when: w) no current is drawn from the battery x) a very large current is drawn from the battery y) the internal resistance of the battery is very large z) the resistance in the external circuit is small 

Last Answer : ANSWER: W -- NO CURRENT IS DRAWN FROM THE BATTERY

Are lip studs (and other body jewelry) electro-conductive?

Description : Are lip studs (and other body jewelry) electro-conductive?

Last Answer : Normally, studs and the like are of silver or gold which are excellent electrical conductors.

Should cars have bumpers that collapse under impact? (1) Yes, since the offending car should get damaged and pay for the mistake (2) No, since it would be very expensive to get the car repaired (3) No, since the colliding car would then ram into the occupants and kill them (4) Yes, since they help to absorb the impact of a collision and keep the occupants safe

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Last Answer : (4) Yes, since they help to absorb the impact of a collision and keep the occupants safe Explanation: In automobiles, a bumper is the front-most or rear-most part., ostensibly designed ... in high-speed impacts, but are increasingly being designed to mitigate injury to pedestrians struck by cars.

Should cars have bumpers that collapse under impact? (1) Yes, since the offending car should get damaged and pay for the mistake (2) No, since it would be very expensive to get the car repaired (3) No, since the colliding car would then ram into the occupants and kill them (4) Yes, since they help to absorb the impact of a collision and keep the occupants safe

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Last Answer : (4) Yes, since they help to absorb the impact of a collision and keep the occupants safe

Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test as the ______________. A. insulation may be damaged B. insulation may be covered with moisture C. armature windings will have a greater number of leakage paths D. larger machines may acquire a charge of static electricity during operation

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Last Answer : Answer: D

Before testing insulation with a megohmmeter, the windings of large machines should be grounded for about 15 minutes just prior to the test, because the ___________. A. static charge of the machine may give a false reading B. armature will have a greater number of leakage paths C. insulation may be damaged D. insulation may be covered with moisture

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Last Answer : Answer: A

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Last Answer : The magnitude of a magnetic field depends on the current and distance.

What is a magnetic field ?

Description : What is a magnetic field ?

Last Answer : Magnetic field : The area where a magnet is located as far as the effect of its ball extends around it is called magnetic field.