State Fleming's right hand rule or Dynamo rule.

State Fleming's right hand rule or Dynamo rule.
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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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Related questions

State Fleming's left hand rule (motor rule).

Description : 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.

What should be the angle between the thumb (main) finger and the central finger in Fleming’s rule? What does each finger indicate?

Description : 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.

State the functions of the following components in a dynamo /motor.

Description : State the functions of the following components in a dynamo /motor.

Last Answer : a) Commutator: It is used to alter the direction of the current in me coil after every half rotation. b) Carbon brushes: it is used to supply a continuous current to the rotating coil through the commutator.

A cyclist riding a cycle fitted with a dynamo to a tyre gets bright light in the bulb connected, when he pedals fast. Why?

Description : A cyclist riding a cycle fitted with a dynamo to a tyre gets bright light in the bulb connected, when he pedals fast. Why?

Last Answer : More magnetic lines of force change with respect to the coil, leading to more current being produced.

What energy conversion does take place in a dynamo when it is in use?

Description : What energy conversion does take place in a dynamo when it is in use?

Last Answer : Mechanical energy changes into electrical energy.

In an AC dynamo, the speed at which the coil rotates is doubled. How would this affect a) the frequency of output voltage b) the maximum output voltage?

Description : In an AC dynamo, the speed at which the coil rotates is doubled. How would this affect a) the frequency of output voltage b) the maximum output voltage?

Last Answer : a) Frequency is doubled b) Maximum output voltage is doubled.

Suggest two ways in an AC dynamo to produce a higher emf.

Description : Suggest two ways in an AC dynamo to produce a higher emf.

Last Answer : a) By increasing the speed of rotation of coil b) By increasing the number of turns of the coil.

Give reason: Split rings are used instead of slip rings to construct DC dynamo

Description : Give reason: Split rings are used instead of slip rings to construct DC dynamo

Last Answer : Split rings make the current to flow in the same direction in the external circuit in both cycles.

What is a DC dynamo?

Description : What is a DC dynamo?

Last Answer : A dynamo that produces a "direct current" is called DC dynamo.

What is an AC dynamo?

Description : What is an AC dynamo?

Last Answer : A dynamo that produces an alternating current is called AC dynamo.

On what principle does a dynamo work?

Description : On what principle does a dynamo work?

Last Answer : Dynamo works on the principle of electromagnetic induction.

What is a dynamo?

Description : What is a dynamo?

Last Answer : A dynamo is a device which converts mechanical energy into electrical energy.

FLEMING’S RIGHT HAND RULE

Description : 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.”

Flemings right hand rule is used to find the direction of the – (1) Alternate current (2) Direct current (3) Induced current (4) Actual current

Description : 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.

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

Description : 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

Fleming's Right hand rule

Description : 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.

One of the following is not a valid statement: A) Fleming’s right hand rule is used to find out the direction of

Description : 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

While applying Fleming's right-hand rule to And the direction of induced e.m.f., the thumb points towards?

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.

Fleming's right-hand rule regarding direction of induced e.m.f., correlates?

Last Answer : 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.

According to Fleming's right-hand rule for finding the direction of induced e.m.f...

Description : 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.

What is the difference between Fleming's right and left hand rule?

Description : 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.

1. State Fleming’s left-hand rule. -Physics-10

Description : 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.

What does Fleming's left hand rule state?

Description : 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.

State Faraday's second law of electromagnetic induction.

Description : State Faraday's second law of electromagnetic induction.

Last Answer : The Magnitude of the induced e.m.f is directly proportional to the rate of change of magnetic field linking the conductor.

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

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

Last Answer : Whenever a magnetic field linked with a conductor changes, an induced e.m.f is generated in the conductor.

State the SI unit of potential difference and emf.

Description : State the SI unit of potential difference and emf.

Last Answer : The SI unit of potential difference and emf is volt.

FLEMING’S LEFT HAND RULE

Description : 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.

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

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.

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

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

Last Answer : motion

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

Description : 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

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

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

Fleming’s left hand rule is applicable to

Description : Fleming’s left hand rule is applicable to

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

Fleming's left hand rule is used to find ___________.

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

What is Fleming's left hand rule used for?

Description : What is Fleming's left hand rule used for?

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

Briefly explain the construction and working of an induction coil.

Description : Briefly explain the construction and working of an induction coil.

Last Answer : Construction: An induction coil consists of a primary P having few turns of thick insulated copper wire wound over a soft iron core connected to a battery. It also has a secondary coil S of larger number ... repeats. During the make break of the circuit, large e.m.f is induced in the secondary coil.

What is an induction coil?

Description : What is an induction coil?

Last Answer : Induction coil is a device which is used to obtain high D.C voltage from a low voltage DC source.

The secondary coil of a transformer in which the voltage is stepped down are usually made of thicker wire than primary. Why?

Description : The secondary coil of a transformer in which the voltage is stepped down are usually made of thicker wire than primary. Why?

Last Answer : The secondary coil is made of thicker wire to sustain larger electric current.

Mention the factors on which the magnitude of the e.m.f induced in the transformer depends.

Description : 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

What are primary and secondary coil in a transformer?

Description : What are primary and secondary coil in a transformer?

Last Answer : The coil which is connected to input source is called primary coil. The coil which is connected to the output source is called secondary coil.

What is a step down transformer?

Description : What is a step down transformer?

Last Answer : A transformer which decreases the input voltage of the AC source is called step down transformer.

What is a step up transformer?

Description : What is a step up transformer?

Last Answer : A transformer which increases the input voltage of an AC source is called a step up transformer.

What is meant by mutual induction?

Description : What is meant by mutual induction?

Last Answer : The production of induced e.m.f in secondary coil due to change of current in a neighbouring primary coil is called mutual induction.

On what principle does a transformer work?

Description : On what principle does a transformer work?

Last Answer : Transformer works on the principle of electromagnetic induction.

What is a transformer?

Description : What is a transformer?

Last Answer : A transformer is a device which is used for increasing or decreasing the AC voltage.

Give reason: Stationary coil and stationary magnet cannot produce induced electric current.

Description : Give reason: Stationary coil and stationary magnet cannot produce induced electric current.

Last Answer : An emf is induced in the coil only when there is relative motion between the coil and the magnet.

What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?

Description : What is the effect on the magnitude of emf generated in an AC generator if the speed of rotation is increased?

Last Answer : The magnitude of emf generated increases.

What determines the frequency of AC produced in a generator?

Description : What determines the frequency of AC produced in a generator?

Last Answer : The number of rotations of the coil in one second determines the frequency of a AC generator.

Mention the devices that work on AC motor.

Description : Mention the devices that work on AC motor.

Last Answer : Electric fans, electric mixer, electric grinder, washing machine work on AC source.

On what principle does an electric motor work?

Description : On what principle does an electric motor work?

Last Answer : An electric motor utilizes the magnetic effect of current. It works on the principle that a conductor carrying current in a magnetic field experiences a mechanical force.