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Fleming's right-hand rule regarding direction of induced e.m.f., correlates magnetic flux, direction of motion and the direction of e.m.f. induced.

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Last Answer : While applying Fleming's right-hand rule to And the direction of induced e.m.f., the thumb points towards direction of motion of conductor, if forefinger points along the lines of flux.

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According to Fleming's right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of?
Last Answer : According to Fleming's right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of lines of force.

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What is the purpose of Fleming's left hand rule?

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The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, ... and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor
Last Answer : (d) current, magnetic field and direction of force on a conductor

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Flemings right hand rule is used to find the direction of the – (1) Alternate current (2) Direct current (3) Induced current (4) Actual current
Last Answer : (3) Induced current Explanation: Fleming's right hand rule shows the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first ... finger mutually perpendicular to each other. The rule is named after British engineer John Ambrose Fleming.

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Fleming’s right hand rule is used to find the direction of the (1) Alternate current (2) Direct current (3) Induced current (4) Actual current
Last Answer : Induced current

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One of the following is not a valid statement: A) Fleming's right hand rule is used to find out the direction of current in the conductor of a generator B) Fleming's left hand rule is ... hand thumb rule is used to find out the direction of counter current produced in the armature magnetic field
Last Answer : One of the following is not a valid statement: A) Fleming's right hand rule is used to find out the direction of current in the conductor of a generator B) Fleming's left hand rule is ... hand thumb rule is used to find out the direction of counter current produced in the armature magnetic field

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In Fleming's left hand rule, thumb shows direction of A. current B. field C. motion D. charge
Last Answer : motion

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Fleming's left hand rule is used to find (a) direction of magnetic field due to current carrying conductor (b) direction of flux in a solenoid (c) direction of force on a current carrying conductor in a magnetic field (d) polarity of a magnetic pole
Last Answer : (c) direction of force on a current carrying conductor in a magnetic field

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Last Answer : The left hand rule correlates to current, magnetic field and direction of force on a conductor.

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State Fleming's right hand rule or Dynamo rule.
Last Answer : Arrange the first three fingers of the right hand mutually perpendicular to each other; if the fore finger indicates the direction of magnetic field, the thumb in the direction of motion of the conductor, then the middle finger indicates the direction of the induced e.m.f

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FLEMING’S RIGHT HAND RULE
Last Answer : “Stretch the thumb, forefingers and middle finger of the right hand so that they are perpendicular to each others. If the forefingers indicates the direction of the magnetic field and thumb shows the direction of motion of the conductor. The middle finger shows the direction of induced current.”

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Fleming's Right hand rule
Last Answer : Fleming's Right Hand Rule: Stretch out the first three fingers of your right hand such that they are mutually perpendicular to each other. If first finger indicates direction of magnetic field, ... to magnetic field, then the middle finger will indicate the direction of induced EMF / current.

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199 views 2 answers







What is the difference between Fleming's right and left hand rule?
Last Answer :  Fleming's right hand rule is use for generators and  Fleming's left hand rule is use for motors. In both rules thumb represent motion of conductor, fore finger represent magnetic field and middle finger represents current.

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If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?
Last Answer : If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be zero.

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Last Answer : In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called armature.

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The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be?
Last Answer : The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be 580 V.

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Last Answer : If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.

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1. State Fleming’s left-hand rule. -Physics-10
Last Answer : Fleming’s Left hand rule states that if we arrange our thumb, forefinger and middle finger of the left hand at right angles to each other, then the thumb points towards the ... points towards the direction of magnetic field and the middle finger points towards the direction of current.

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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.

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State Fleming's left hand rule (motor rule).
Last Answer : If the first three fingers of the left hand are held mutually perpendicular to each other such that the finger points in the direction of magnetic filed, the middle finger points in the direction of current, then the thumb points in the direction of mechanical force acting on the conductor.

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FLEMING’S LEFT HAND RULE
Last Answer : FLEMING'S LEFT HAND RULE:  Stretch the forefinger, the central finger and thumb of your left hand mutually perpendicular to each other. If the forefinger shows the direction of the field and central ... of the current then the thumb will point towards the direction of the motion of the conductor.

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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

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Fleming’s left hand rule is applicable to
Last Answer : Fleming’s left hand rule is applicable to dc motor

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Last Answer : Fleming's left hand rule is used to find direction of force on a current carrying conductor in a magnetic field

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What does Fleming's left hand rule state?
Last Answer :  Fleming's Right Hand Rule: Stretch out the first three fingers of your right hand such that they are mutually perpendicular to each other, align first finger in direction of magnetic field, thumb ... of conductor with respect to field then the middle finger will give the direction of induced EMF.

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What is Fleming's left hand rule used for?
Last Answer : Fleming's left hand rule used for electrical motors.

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Which of the following quantity maintains the same direction whether a D.C. machine runs as a generator or as a motor a. Induced e.m.f. b. Armature Current c. Field Current d. Supply Current  
Last Answer : Which of the following quantity maintains the same direction whether a D.C. machine runs as a generator or as a motor a. Induced e.m.f. b. Armature Current c. Field Current d. Supply Current  

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What is Fleming's left-handed rule ?
Last Answer : : If the thumb , forefinger and middle finger of the left hand are extended at right angles to each other, if the index finger points in the direction of the magnetic force line and the direction of the middle current, then the thumb will point in the direction of rotation of the conductive wire.

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What should be the angle between the thumb (main) finger and the central finger in Fleming’s rule? What does each finger indicate?
Last Answer : The angle between the thumb and the central finger must be 90o. Fore finger indicates direction of magnetic field, thumb indicates direction of mechanical force / motion of conductor and the central finger indicates the direction of induced current or electric current.

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A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly?
Last Answer : 200V/E2 = 1000/1200 E2= 240 V

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Last Answer : The e.m.f. generated in a D.C. generator is directly proportional to speed of armature.

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Last Answer : In a D.C. generator the ripples in the direct e.m.f. generated are reduced by using carbon brushes of superior quality.

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In the right-hand rule for propagation, the thumb points in the direction of the E field and the forefinger points in the direction of the H field. In what direction does the middle finger point?
Last Answer : Direction of wave propagation.

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Which one of the following applications software’s is used to obtain an accurate root locus for? a) LISP b) MATLAB c) dBase d) Oracle Ans: B 6.Lenz devised a rule to find out direction of a)current induced in a circuit b)electromagneticdifference c)potential difference d)flow of power in fuse
Last Answer : Ans: A

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What rule should you use to determine the direction of induced emf in a coil?
Last Answer : The left-hand rule for generators.

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“The direction of induced current is always so as to oppose the change which causes the Current” is the statement of: a. Faraday’s law b. Lenz’s Law c. Ohm’s Law d. Kirchoff’s rule.
Last Answer : c. Ohm’s Law

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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

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1. Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop. -Physics-10
Last Answer : Solution: For the downward direction of the current, the direction of the magnetic field will be as if emerging from the table outside the loop and merging with the table inside the loop. Similarly, ... the table outside the loop and merging with the table inside the loop, as shown in the figure.

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Fleming is Right Hand Rule is used to find the direction of –
Last Answer : Induced Curren

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Eddy currents are induced in the pole shoes of a D.C. machine due to?
Last Answer : Eddy currents are induced in the pole shoes of a D.C. machine due to relative rotation between field and armature.

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Mention the factors on which the magnitude of the e.m.f induced in the transformer depends.
Last Answer : 1) E.m.f in the primary coil 2) Number of turns in the primary coil 3) Number of turns in the secondary coil 4) The core material

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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

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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

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The introduction of interpoles in between the main pole improves the performance of d.c. machines, because (A) The interpole produces additional flux to augment the developed torque. (B) The flux waveform is ... armature is removed. (D) A counter e.m.f. is induced in the coil undergoing commutation.
Last Answer : Ans: D Counter e.m.f is produced, it neutralizes the reactive emf.

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Which law states that induced e.m.f and current always opposes the cause producing them?
Last Answer : Lenz's law states that induced e.m.f and current always opposes the cause producing them.

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These self inductance of a circuit is defined as twice the work done against the induced e.m.f. on establishing unit current in the coil. If the current to be established in the coil is doubled, the work done ... induced e.m.f. will be  1. Doubled  2. Halved  3. four times  4. Quarter times 
Last Answer : These self inductance of a circuit is defined as twice the work done against the induced e.m.f. on establishing unit current in the coil. If the current to be established in the coil is doubled, the work done against the induced e.m.f. will be four times

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The e.m.f. induced in the primary of a transformer:  (A) is in phase with the flux (B) lags behind the flux by 90 degree (C) leads the flux by 90 degree (D) is in phase opposition to that of flux
Last Answer : The e.m.f. induced in the primary of a transformer: leads the flux by 90 degree 

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The voltage regulation of an alternator having 0.75 leading p.f. load, no-load induced e.m.f. of 2400V and rated terminal voltage of 3000V is —————————————  A) 20% B) —20% C) 150 D) -26.7
Last Answer : -20

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