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If a wire with no current passes a magnetic field of flux will voltage be induced into the wire?
Wiki User
∙ 15y ago
Yes, for as long as the magnetic field is moving along the conductor. A static magnetic field will not induce current, a dynamic field is required.
Wiki User
∙ 15y ago
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If an electrical current passes through a conductor what two things are generated?
If an electrical current passes through a conductor, there is an induced voltage (because no conductor has perfectly zero ohms), resulting in power dissipation, and there is a magnetic field, which can interact with other conductors in the vicinity of the first.
What will happen if you pass ac current passes through a inductor?
magnetic flux will be induced its use to rotate the shaft or given some force
If your car moves over a wide closed loop of wire embedded in a road urface is the magnetic field on the earth within the loop?
yes the perpendicular component of earths magnetic field passes through the loop even if the car is moving above it or not , but no current is induced in the loop since it is not moving
Why are moving iron test instruments not used with DC although they can work in DC?
For moving-iron instrument magnetic field is caused when the current (voltage) passes the fixed circle. When the current (voltage) passes the fixed circle，the two iron plates are magnetized ,rotational torque is resulted, the deflection angle indicate measured current. Because the magnetized polarity is same for AC or DC, moving-iron instrument can be used in AC and DC circuit. For permanent-magnet moving-coil instrument magnetic field is caused by the permanent-magnet, When the DC current passes the moving coil, rotational torque is resulted,so the deflection angle indicate measured DC current. As AC current passes the moving coil ,because inertia of moving parts of meter the deflection angle indicate rotational torque average, but rotational torque average is zero in cycle, moving parts of meter is´t deflec,so permanent-magnet moving-coil instrument only is used in DC circuit.
Why in inductor the current lags the voltage?
Because in an AC circuit, a capacitor opposes the change of voltage in at. At the peak of the voltage waveform, there is no change (it is nearly flat), so at this same point in time, the current waveform is at zero. Likewise, when the voltage waveform crosses zero, it is changing at its fastest rate, so the current is at its peak. If you draw these two waveforms next to one another, you will see the voltage has the appearance of being behind the current - hence the term 'lag'.
If an electrical current passes through a conductor what two things are generated?
If an electrical current passes through a conductor, there is an induced voltage (because no conductor has perfectly zero ohms), resulting in power dissipation, and there is a magnetic field, which can interact with other conductors in the vicinity of the first.
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.
Why there is an induce current in a coil when a coil is compressed in a magnetic field?
compressing a coil in a magnetic field means that there is a relative movement of the the said coil existing in a magnetic field, hence current will be induced. induction law.Another Answer'Current' is not induced into a coil. It's voltagethat's induced; if the coil forms a closed loop, then current will flow; if there is no closed loop, then no current will flow.The induced voltage results from either a change in current through the coil, or from the relative movement between the coil and an external magnetic field.
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.
What is the principle of electromagnetism?
pricinples of electromagnetism state that when current passes through a piece of wire magnetic field is generated around the piece of wire and when a piece of wire passes through the magnetic field current is induced into the piece of wire
What is the three principle of electromagnet?
pricinples of electromagnetism state that when current passes through a piece of wire magnetic field is generated around the piece of wire and when a piece of wire passes through the magnetic field current is induced into the piece of wire
Why doesn't a transformer work only on a DC supplyand not in ac supply?
A transformer doesn' t work with DC current because voltage is induced in the output winding of the transformer when a magnetic field passes through the coils of this winding. This happens with AC current because the magnetic field is continually expanding and contracting. With a DC current the magnetic field is unchanging other than when you first turn it on. Since the magnetic field is not moving it is not moving through the windings and no voltage is produced.
What will happen if you pass ac current passes through a inductor?
magnetic flux will be induced its use to rotate the shaft or given some force
Can a magnet create electricity?
yes, when a copper wire is coiled around it and attached to a battery, an electrical current passes through it. =============================== The above is not the apt answer for the query made. Yes when a magnet is moved through a coil of wire then current is induced in it. This phenomenon is known as electro magnetic induction and current is known as induced current. This is because of change of magnetic flux linked with the coil. So whenever there is a change in magnetic flux linked with a closed circuit then current is induced in the circuit. The current lasts so long as there is change in magnetic flux. Just link of magnetic flux will not induce any current. Only the change of magnetic flux does everything. This is very very important.
How do relay contacts become pressed together when a current passes in the coil?
Relay contacts change state (become pressed together) when a current passes through the coil because that current causes a magnetic field to be induced which attracts the armature, to which is attached the contacts.
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.
SI unit of magnetic-induction?
Electromagnetic induction is the process of inducing electric current in a coil with the help of a magnet.Whenever a conductor is moved through a magnetic field, or the magnetic field fluctuates in strength (as with an AC electromagnet), a current will be induced in that conductor. Induction cooktops work by passing a large AC current through a conductor under the cooktop, creating a fluctuating magnetic field which induces an electric current through the cookware - heating the cookware by electrical resistance.The process by which a substance, such as iron or steel, becomes magnetized by a magnetic field. The induced magnetism is produced by the force of the field radiating from the poles of a magnet.CommentFurther to the original answer, it is a voltage that is induced into a conductor, NOT a current.
