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What rule is applied to find the polarity of the face of a current carrying circular coil?
in physics
In what two ways can the rotation of a shunt connected dc motor be reversed?
DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil.
What rule is used to find out polarity of a current carrying solenoid?
right hand rule is used to find out the polarity of current
Can you connect pressure coil instead of current coil in watt meter to measure power?
You have to connect both coils to measure power: the current coil in series with the load, and the voltage ('pressure') coil in parallel with the supply. And you have to observe the wattmeter's polarity markings if you don't want it to read downscale (backwards)!
What wires are positive on an ignition module for a 1982 F150?
Chances are there is no polarity. An ignition coil is simply a wound of wires used to generate high voltage. But you may find a marking on it such as a "+" or a red wire wich would indicate the positive electrode.
How do you produce a current with a magnet and coil of wires?
Move the magnet up and down through the centre of the coil. The quicker it is moved the higher the voltage generated. When the magnet moves towards the coil it generates current with one polarity and when withdrawn the current reverses in polarity. This is described in Fleming's left hand rule. The voltage generated can be increased by adding more turns of wires to your solenoid. All electricity from any type of power station is produced in this way.
What lets the north pole and south pole of a solenoid be able to change poles?
The poles of the solenoid depend on the direction of the current through the coil. The current reverses if you just reverse the polarity of the voltage between the ends of the coil. Heck, if you energize the coil with AC, you can do that 120 times every second.
What is the purpose of the diode inside the relay?
If it is a light emitting diode it is there to let you know that the relay is energized. In my experience, when a DC current is removed from a coil, the polarity of the magnetic field reverses and if it weren't for the diode, the relay would "chatter". The diode polarity is oppsite of the actuating voltage.
Why is it necessary to consider positive and negative terminals of the ammeter when you connect leads from it to the circuit?
When you are dealing with DC voltages polarity is very important. Inside the ammeter is a coil through which the circuit amperage flows. Inside this coil is connected a steel armature of the meter movement. The more current is applied through the coil, the more the steel of the meter movement is drawn into the coil and this in turn moves the needle on the face of the meter to move further up the scale. If the coil polarity is reversed the magnetic field in the coil is reversed and the steel armature is driven in reverse. So instead of the meter movement moving up the scale it is driven to the zero end of the meter scale and it hammers up against the stop pin on the scale face.
How can the direction of rotation of a DC shunt motor be reversed?
DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil.
What is polarity test and continuity test?
a test to be conduct for find the phase...
How the current and pressure coils of the wattmeer are connected in circuit to measure the power drawn by load?
The current coil is connected in series with the load. The voltage coil (the term, 'pressure coil' is rather archaic!) is connected in parallel with the load. The wattmeter's polarity markings must be taken into account, or the meter will read downscale (backwards).
