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An electro magnet draws 25 ampere of current and has a resistance of 10 ohms what is the voldtage being supplied?
Wiki User
∙ 15y ago
Ohms law: E (Volts) = I (Amps) X R (Ohms) Do the math!
Wiki User
∙ 15y ago
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What happens when a magnet is moved towards a coil?
You will generate electricity. As the wire cuts through the magnetic field.As the magnet is moved, there will be an induced electro-motive force (EMF) which can cause a current in the coil. Once the magnet stops moving, the current will go to zero.
What is reactance?
The influence of a coil of wire upon an alternating current passing through it, tending to choke or diminish the current, or the similar influence of a condenser; inductive resistance. Reactance is measured in ohms. The reactance of a circuit is equal to the component of the impressed electro-motive force at right angles to the current divided by the current, that is, the component of the impedance due to the self-inductance or capacity of the circuit.
Where did the word electro come from?
greece
Application of electrical circuit analogies in magnetic circuit?
Magnetic circuit follows equation (4) that is Ni = (Ф) ( l / μA) or m.m.f(magneto motive force) = (Flux) (reluctance).Electric circuit follows ohm's law that is E = I.R or e.m.f(electro motive force) = (current) (Resistance)From above point m.m.f in magnetic circuit is like as e.m.f in electrical circuit.Flux in magnetic circuit is similar as current in electrical circuit.Reluctance in magnetic circuit, S = ( l / μA) is similar to resistance R = (ρl/A) in electric circuit.Permeance (= 1/reluctance) in magnetic circuit is equivalent to conductance (=1/resistance) in electric circuit.In magnetic circuit flux establishes but not flow like as current in magnetic circuit.In magnetic circuit energy needed only to establish the flux but no consistent energy need to maintain it whereas in electric circuit continuous energy needed to flow of current.Resistance of an electric circuit is constant (for same temperature) and is independent of current but reluctance of magnetic circuit is not constant because it depends on μ (=B/H) which is not constant and depends on B/H.
What is BEMF?
The letters stand for (Back Electro Motive Force).
What happens when there is a current in the ignition current?
When a electro magnet is formed
What is the difference bt current electricity and electro dynamics?
current electricity =battery , wire electro dynamics = motor , generator , speaker
What does an alternator rotor do?
The rotor is a electro magnet with a North and South pole at ether end the ends have fingers that wrap around the centre coil of wire alternating North and South magnetic polarity fields. The more current supplied to the rotor the stronger the magnetic field, the more current produced in the stator and the higher the output amperage supplied to the electrical system
How can you express ohms law in mathematical?
Voltage = Current * Resistance ANSWER: 1000V = 1000 I = 1000 Ohms does not compute It is a relationship that states if there is 1 ohm and 1 volt there will be =1 amperes flowing. The number can change but the relation ship will not
What happens when there is current in the ignition circuit?
When a electro magnet is formed
What happens when there is a current in the ignition circuit?
When a electro magnet is formed
Why ohmmeter cannot read the resistance value when current flows through resistor?
An ohmmeter works by sending a DC voltage through the load under test and measuring the current passed. This works from Ohm's law E/R=I, so, for example, a meter with a source E=9v measuring a 10kΩ resistor would sense 0.0009 Amps (or 900µa) passing through the resistor. If there is some other current being passed through the resistor at the same time, there is no way for the meter to accurately account for this current which would be added to (or subtracted from) the sense current supplied by the meter. (This is an oversimplification since the Ohmmeter will actually provide a current-limited voltage source and must account for the series resistance of the meter (in the case of an analog electro-magnetic meter), current-limiting circuit, internal resistance in the meter batteries (if applicable), etc. in order to generate an accurate reading, however, the above describes the general theory of operation).
In electro deposition current density of bath means current per unit area of anode or cathode?
In electro deposition current density of bath means current per unit area of cathode.in which proportion rate depends on cathode to anode area?
What is a magnet that is creadted from electric current through a wire?
Electro-Magnet
What do you mean by Electro Luminescence?
A device that glows when excited by electric current, but does not generate heat.
Why does adding more voltage result in more current?
In most circuits, Ohm's Law applies exactly, and its states the current (I) is directly proportional to the applied voltage (E) across the circuit (electro-motive force - EMF), but that the current is inversely proportional to the circuit's resistance (R). In this case, I=E/R A higher EMF makes (i) more current carriers (in metallic wires, electrons) available, and (ii) drives them more rapidly. A higher resistance restricts the ability of the current carriers to flow. Because V=IR It is a fact of very simple maths and a result of the convention relating, V, I and R.
What is a temporary magnet caused by an electrical current?
A Electro Magnet, caused in theory by the alignment of the particles in the material duo to the current passing through it.
