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When a conductor is rotated in a magnetic field at what point in the cycle is emf at maximum amplitude?
When a conductor is rotated in a magnetic field, the electromotive force (emf) reaches its maximum amplitude when the plane of the conductor is perpendicular to the magnetic field lines. At this point, the rate of change of magnetic flux through the conductor is highest, leading to the maximum induced emf according to Faraday's law of electromagnetic induction. This occurs twice during each complete rotation, specifically at 90 degrees and 270 degrees of the rotation cycle.
Why does the current carrying conductor experiences a force when it is placed in magnetic field state Fleming's left hand rule?
The force on current carrying conductor kept in a magnetic field is given by the expression F = B I L sin@ So the force becomes zero when the current carrying conductor is kept parallel to the magnetic field direction and becomes maximum when the current direction is normal to the magnetic field direction. Ok now why does a force exist on the current carrying conductor? As current flows through a conductor magnetic lines are formed aroung the conductor. This magnetic field gets interaction with the external field and so a force comes into the scene.
What is the maximum current that can flow through a fuse?
A current rating of a fuse is designed to open a circuit at a specific current flow. This rating is imprinted on the fuse and lets you know what the maximum amount of current the fuse is designed to open at. A fuse is in the circuit to protect the conductor that the current flows through. Never over fuse a conductor's current carrying capacity.
What happens when dc supply is given to inductor?
The resulting maximum current is limited by the resistance of the inductor. As the current increases from zero to that maximum value, its expanding magnetic field induces a voltage into the inductor which opposes the rise in that current. So, instead of reaching its maximum value instantaneously, it takes some time -determined by the equation:time to maximum current = 5 L / R (seconds)where L = inductance of inductor in henrys, and R = resistance of inductor in ohms.
Why the transformer rating in kva why not in kw?
A transformer has separate ratings for maximum voltage and maximum current. Both limits must be observed. The maximum voltage is set by the magnetic flux density in the core, while the current limit is set by the size of the wire used in the primary and secondary windings. Multiplying the two together gives the VA or kVA rating.
When does current carrying conductor placed in a magnetic field experiences a maximum force?
It experiences maximum force when it is placed perpendicular to the direction of magnetic field.
When a conductor is rotated in a magnetic field at what point in the cycle is emf at maximum amplitude?
When a conductor is rotated in a magnetic field, the electromotive force (emf) reaches its maximum amplitude when the plane of the conductor is perpendicular to the magnetic field lines. At this point, the rate of change of magnetic flux through the conductor is highest, leading to the maximum induced emf according to Faraday's law of electromagnetic induction. This occurs twice during each complete rotation, specifically at 90 degrees and 270 degrees of the rotation cycle.
Why does the current carrying conductor experiences a force when it is placed in magnetic field state Fleming's left hand rule?
The force on current carrying conductor kept in a magnetic field is given by the expression F = B I L sin@ So the force becomes zero when the current carrying conductor is kept parallel to the magnetic field direction and becomes maximum when the current direction is normal to the magnetic field direction. Ok now why does a force exist on the current carrying conductor? As current flows through a conductor magnetic lines are formed aroung the conductor. This magnetic field gets interaction with the external field and so a force comes into the scene.
What changes the flow of electrons in an alternating current?
first of all the voltage doesn't change what changes is the current direction the way they do it is by using magnet . electrons tend to escape from the magnetic field . you can find on you tube how a motor works for better idea.
Why and when does a current carrying conductor kept in a magnetic field experiences a force list factor on which the direction of this force depend State the rule which may be used to determine the di?
Current carrying conductor will have magnetic lines around it. So when it is kept perpendicular to the magnetic field then the force would be maximum. The force depends on 1. magnitude of current 2. Magnetic field induction 3. Angle between the direction of current and magnetic field. Fleming's Left hand rule is used to find the direction of force acting on the rod
Why the moment is maximum when the coil is horizontal?
The moment is maximum when the coil is horizontal because this orientation aligns the plane of the coil perpendicular to the magnetic field. In this position, the magnetic forces acting on the current-carrying coil create the greatest torque, as the angle between the magnetic field lines and the current direction is 90 degrees. This results in the maximum effective leverage on the coil, producing the highest rotational force. Consequently, the induced torque is at its peak, leading to maximum moment.
How is electricity produced from magnetism?
Electricity can be produced from magnetism through electromagnetic induction. When a conductor, such as a wire, moves through a magnetic field or when the magnetic field around a conductor changes, it induces an electric current to flow in the conductor. This current flow is the basis for producing electricity in generators and other electrical devices.
How do the maximum and minimum voltages depend on the speed of the magnet?
The induced emf ie voltage in a conductor or coil is directly proportional to the rate at which the magnetic flux linked with it changes. So when the speed is less then dB/dt will be less and so induced voltage becomes less. If the speed is high then dB/dt will be very much high and so large emf will be induced.
Why electronic equipments get damaged in electro magnetic field?
Answer: a changing magnetic field results in an emf, and that is basically the principal of electromagnetic induction. This means that if you pass a magnetic field across a conductor, it will induce a current in that conductor. A piece of electronics is often a semiconductor that is designed to have an exact amount of current flowing through it, and no more. If you pass a magnetic field near the semi-conductor, it may induce a current in that conductor greater that the maximum that the device was designed for, and this could result in that devices break down. The same is true of hard disk drives, accept in the case of a hard drive (magnetic storage), the device uses magnetic media to store information, and passing a magnet near it will erase the information. A common place for magnets to be found is in speaks systems.
Why voltage leads in Inductor?
Maximum induced voltage occurs when the current is changing at its greatest rate -this occurs when the current passes through zero. Since this voltage acts to oppose current flow, this maximum voltage acts in the negative sense when the current is acting in the positive direction. Since the supply voltage is equal, but opposite, the induced voltage, it is maximum when the current is zero -so leads by 90 degrees.
Why must the instantaneous current wave be exact 90 degree out-of phase with the applied voltage waveform across an ideal inductor?
Because the voltage induced is proportional to the rate of change of current, and the maximum rate of change of current occurs at the point where the current waveform is 'steepest' -i.e. as it passes through zero. So, as the current passes through zero, the corresponding value of induced voltage is maximum, which means the voltage and current waveforms are displaced by a quarter of the wavelength, or 90 degrees.
When is the force on a current carrying wire in a magnetic field at its strongest?
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