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At what degree does a conductor have to pass through a magnetic field to get maximum induced current?
Wiki User
∙ 14y ago
The induced current is maximum when the axis of the conductor, its velocity, and the magnetic field lines are all mutually perpendicular.
Wiki User
∙ 14y ago
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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.
What happen when current transformer saturate?
I am assuming that we are referring to an ordinary power transformer working at 50-60 Hz of alternating current circuit system. Saturation in these transformers is the result of the magnetic field in the iron core reaching the saturation phase. At low current levels on the input side (currents are measured in amperes or amps) the magnetic filed produced in the core increases linearly with the current. Consequently, the current produced in the output coils is proportional to the input currents. If the amount of current in the input coil is large, the magnetic field in the core will not be a smooth sine wave, but a sine wave with tops and bottoms chopped as the magnetic core reaches saturation at the peak current level. This happens even if the input current remains a sine wave. The current induced in the output is directly proportional to the magnetic field and hence has the same shape - chopped off sine wave. Here are some of the implications: 1. Energy transfer from input to output is now limited by the chopping process which limits the peak current that can be induced into the output coil. 2. Energy transfer efficiency goes down - more energy may be poured in, but output energy does not increase significantly. Transformer will heat up as input coils experience greater currents. There will also be greater heating of the magnetic core due to magnetic hysteresis effects. 3. The output current has a chopped sine wave shape and hence has more 'harmonics' - waves with frequencies that are multiples of the input waves. The output current wave shape resembles a square wave more than the input sine wave. This is akin to waves produced by electric guitar distortion equipment. While this may not be important in some applications such as heating, it is usually unacceptable in audio transformers.
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.
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
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.
What may be the maximum neutral current in unbalanced nonlinear load?
The sum of all phase conductor currents.
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.
How does magnetic force become stronger?
Since magnitude of magnetic force is given by, Fm = qvB sinθ,force will be maximum when θ = 90o So, magnetic force becomes stronger when a charged particle is moving perpendicular to the direction of magnetic field.
What is the condition for maximum current that can be drawn from a cell?
The maximum current that a cell can deliver flows when the resistance between the terminals of the cell is zero. This situation occurs when the terminals are connected by a conductor with very low resistance, such as a thick wire or a wrench. But not for long.
