Description : Who invented the electric battery?
Last Answer : ANSWER: (ALLESANDRO) VOLTA
Description : As a result of electric current a magnetic field is created around it , from whose test can it be realized ?
Last Answer : An electric current creates a magnetic field around it , as can be seen from Hans Christian Werstead's experiments.
Description : Flemings "Left hand Rule" is associated with the effect of – (1) Electric field on current (2) Magnetic field on magnet (3) Electric field on magnet (4) Magnetic Field on current
Last Answer : (4) Magnetic Field on current Explanation: Whenever, a current carrying conductor comes under a magnetic field, there will be force acting on the conductor and on the other hand, if a conductor ... conductor. In both of the phenomenon, there is a relation between magnetic field, current and force.
Description : A current carrying conductor is associated with – (1) a magnetic field (2) an electric field (3) an electro-magnetic field (4) an electrostatic field
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.
Description : Moving electric charge produces - (1) magnetic field (2) sound waves (3) light rays (4) heat waves
Last Answer : (1) magnetic field Explanation: An electric charge always produces an electric field, regardless of speed, and a moving charge generates a magnetic field. An electric current passing through a conductor produces a magnetic field because it has many charges in motion.
Description : If we reverse the direction of electric current, then the direction of magnetic field will be A. reversed B. remains same C. becomes tangent D. becomes norma
Last Answer : reversed
Description : F = BIL can only be used if the magnetic field and electric current are A. at right angles to each other B. in same direction C. anti-parallel to each other D. anti-perpendicular to each other
Last Answer : at right angles to each other
Description : Whenever there is force on magnetic pole, there exists A. magnetic field B. electric field C. current D. voltage
Last Answer : electric field
Description : Magnetic field can be produced by using A. permanent magnet B. electric current C. temporary magnet D. both A and B
Last Answer : permanent magnet
Description : Electric field strength can be defined as A. E = Q⁄F B. E = W⁄F C. E = F⁄Q D. E = P⁄
Last Answer : E = F⁄Q
Description : Electric field strength on a dust particle having charge equal to 8 × 10- 19 when plates are separated by distance of 2 cm and have a potential difference of 5 kV is A. 2.0 × 10-13 N B. 3 N C. 5 N D. 20 N
Last Answer : 2.0 × 10-13 N
Description : Where an electric charge experiences a force, there is an A. electric field B. magnetic field C. electric current D. conventional current
Description : Electric field strength related to hall voltage is given by A. VHd B. VH⁄d C. VHE D. Ed
Last Answer : VH⁄d
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
Description : In an electric field, energy per unit positive charge is A. voltage B. current C. frequency D. resistance
Last Answer : voltage
Description : When distance from center is doubled then electric field strength will A. decrease by the factor of four B. increase by factor of four C. will be same D. decrease by factor of two
Last Answer : decrease by the factor of four
Description : The electric field of a point charge varies: w) linearly with distance and inversely with charge x) linearly with distance and inversely with charge squared y) linearly with charge and inversely with distance squared z) linearly with charge and inversely with distance
Last Answer : ANSWER: Z -- LINEARLY WITH CHARGE AND INVERSELY WITH DISTANCE
Description : At a point directly east of a negative point charge, the electric field points in what direction?
Last Answer : ANSWER: WEST
Description : Who received the Nobel Prize in Physics in 1923 for his experiment which measured the charge of the electron. The experiment consisted of allowing drops of oil which had become charged to fall in an electric field.
Last Answer : ANSWER: (ROBERT ANDREWS) MILLIKAN
Description : According to Gauss' Law, the magnitude of the electric field is zero everywhere inside a conductor if: w) electrostatic equilibrium is achieved x) the surface is a metal y) the conductor is moving z) the conductor is a non-Gaussian surface
Last Answer : ANSWER: W -- ELECTROSTATIC EQUILIBRIUM IS ACHIEVED
Description : Which of the following phrases completes the following statement: The strength of the electric field between two oppositely charged parallel plates is: w) a maximum midway between the plates x) a maximum ... plate y) constant between the plates except near the edges z) zero midway between the plates
Last Answer : ANSWER: Y -- CONSTANT BETWEEN THE PLATES EXCEPT NEAR THE EDGES
Description : In the Millikan oil-drop experiment the UPWARD force on the drop is due to the: w) gravitational and electric fields x) gravitational field and the charge on the drop y) electric field and the size of the drop z) electric field and the charge on the drop
Last Answer : ANSWER: Z -- ELECTRIC FIELD AND THE CHARGE ON THE DROP
Description : Capacitors and inductors are commonly used in circuits. Capacitors store electrical energy in the electric field between their plates. How do inductors store energy?
Last Answer : ANSWER: IN A MAGNETIC FIELD SURROUNDING THE INDUCTOR
Description : Ten coulombs of positive charge are placed on an irregularly-shaped, solid piece of copper. Once the charge has stopped moving, the electric field inside the copper is: w) zero x) changes as one ... squared y) becomes smaller as you approach the center z) becomes larger as you approach the center
Last Answer : ANSWER: W -- ZERO
Description : At a point halfway between two identical point charges, the electric field is equal to: w) zero x) half its maximum value y) its maximum value z) pointing away from the two charges
Description : The law that relates the electric field at the surface of a region to the amount of charge inside the region is called: w) Coulomb's Law x) Faraday's Law y) Gauss' Law z) Biot-Savart Law
Last Answer : ANSWER: Y -- GAUSS' LAW
Description : In an electromagnetic wave, the ratio of the magnitudes of the electric field to the magnet field is equal to what?
Last Answer : ANSWER: THE SPEED OF LIGHT or C
Description : A constant potential difference is applied across the plates of a parallel-plate capacitor. Neglecting any edge effects, the electric field inside the capacitor is: w) constant x) varying as one over r squared y) decreasing as one moves from the positive to the negative plate z) zero
Last Answer : ANSWER: W -- CONSTANT
Description : For an infinite sheet of positive charge, the electric field lines: w) run parallel to the sheet of charge x) are perpendicular to the sheet of charge and point in toward the sheet y) are perpendicular to the sheet of charge and point away from the sheet z) fall off as one over r squared
Last Answer : ANSWER: Y -- ARE PERPENDICULAR TO THE SHEET OF CHARGE AND POINT AWAY
Description : For a negative point charge, the electric field vectors: w) circle the charge x) point radially in toward the charge y) point radially away from the charge z) cross at infinity
Last Answer : ANSWER: X -- POINT RADIALLY IN TOWARD THE CHARGE
Description : Five volts are applied across the plates of a parallel plate capacitor. The distance of separation of the plates is .02 meters. What is the magnitude of the electric field inside the capacitor?
Last Answer : ANSWER: 250 VOLTS PER METER or 250 NEWTONS PER COULOMB
Description : Flemings “Left hand Rule” is associated with the effect of (1) Electric field on current (2) Magnetic field on magnet (3) Electric field on magnet (4) Magnetic Field on current
Last Answer : Magnetic Field on current
Description : A current carrying conductor is associated with (1) a magnetic field (2) an electric field (3) an electro-magnetic field (4) an electrostatic field
Last Answer : an electro-magnetic field
Description : Moving electric charge produces : (1) magnetic field (2) sound waves (3) light rays (4) heat waves
Last Answer : magnetic field
Description : What was General Motors first idea, when they invented the Cadillac?
Last Answer : answer:This Gotta admit, that’s one fine looking ride for its day!
Description : Have you ever had a brilliant design idea? Or invented something in your mind you never had made?
Last Answer : Like I’m going to tell everyone!
Description : A charge particle travels along a straight line with a speed v in region where both electric field E and magnetic field b are present.It follows that
Last Answer : A charge particle travels along a straight line with a speed v in region where both electric field E ... |=v|E|` and the two fields are perpendicular
Description : The line integral of the electric field intensity is a) Mmf b) Emf c) Electric potential d) Magnetic potential
Last Answer : b) Emf
Description : Calculate the electric field intensity of a line charge of length 2m and potential 24V. a) 24 b) 12 c) 0.083 d) 12.67
Last Answer : b) 12
Description : The work-electric field relation is given by a) Volume integral b) Surface integral c) Line integral d) Relation impossible
Last Answer : c) Line integral
Description : Particle nature of cathode rays is proved due to the fact that they (A) Travel in a straight line (B) Get deflected by magnetic electric field (C) Produce fluorescence (D) Heat the exposed material
Last Answer : Option B
Last Answer : Properties of an Electric Field The following are the properties of an electric field. Field lines never intersect each other. They are perpendicular to the surface charge. The field is strong when ... from negative charge. If the charge is single, then they start or end at infinity.
Last Answer : Faraday introduces the electric ball line.
Description : Q.10 Who invented Electric motor? -Discoveries and Inventions
Last Answer : Ans. William Sturgeon, Emily Davenport, Thomas Davenport, Michael Faraday.
Description : Q.6 Who invented Electric Chair? -Discoveries and Inventions
Last Answer : Ans. Thomas Edison in 1888.
Description : Who invented the electric motor ?
Last Answer : Michael Faraday invented the electric motor.
Description : Who invented the electric battery ?
Last Answer : Maxwell invented the electric battery.
Description : Magnet can be made from electric current , who invented it ?
Last Answer : It is possible to make a magnet out of an electric current.
Description : In what year was the electric telegraph invented ?
Last Answer : The electric telegraph was invented in 1836.
Description : Who invented the electric bulb ?
Last Answer : The electric bulb was invented by Thomas Alva Edison.