Why the resistance of current coil is less and voltage coil is high?

Higher resistance give more accurate voltage reading, So, we connect many resistor in series so that resultant resistance across line should be high and no(very less) current should pass through it and all current should force to pass through current coil, this will lead accurate reading of current .

What is the effect of a thicker wire is used in the coil Why?

Thicker wire allows less reflected resistance , but reduces the amount of turns ,which affects the output voltage .. Its a balancing act.

Will a coil with more turns produce a lower voltage?

The more turns of wire, the stronger the field produced. The induced voltage can be increased by winding the wire into a coil because the field lines intersect the circuit multiple times.

Does using thicker wire make an electromagnet stronger?

Increasing the magnetic field applied to the magnetizable material in turn makes its own magnetic field stronger. Similarly, wrapping with thicker wire has the same effect, but by increasing the current. Like a widening river, a thicker conductor allows more current through.

What is difference between current coil and voltage coil?

The current coil is connected in series with the load and the pressure coil is connected in parallel with the load. Current is measured by the current coil and voltage is measured by the pressure coil. A pointer which experiences the effect of both these coils, moves in the wattmeter scale.

How are voltage coil and current coil connected?

The current coil is connected in series with the circuit, while the voltage coil is connected in parallel. In an analog wattmeter, the voltage coil has a needle attached to it that moves over a scale as the voltage coil moves to indicate how much power, in watts, is passing through the circuit.

Why are thick wires used over thin wires?

The thin wire will conduct electricity, but there is more electrical resistance. The thicker wire is like the four lane highway. There’s a lot less electrical resistance, and as a result, that light bulb burns brighter because more electricity can reach it.

Why do thinner wires have more resistance?

The relationship between resistance and wire length is proportional . The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .

Why does more coils increase voltage?

As the magnetic field expands, it induces current in the second coil. The voltage across the second coil increases as long as the magnetic field expands. Thus, the current induced in the second coil mirrors the current that is passed through the first coil.

Why does more turns increase voltage?

From Faraday’s Law, we can deduce that the greater the rate at which the magnetic field changes, the greater the EMF induced. Also, the more turns there are on the secondary coil, the bigger the induced EMF. If we increase the turns on the secondary coil, the output voltage increases in proportion.

Why does increasing the current make an electromagnet stronger?

Increasing the amount of current flowing through the wire – The magnetic field is caused by the current flowing in the wire. The bigger the current the stronger the magnetic field and hence the stronger the electromagnet.

Why does more current make an electromagnet stronger?

When the electric current moves through a wire, it makes a magnetic field. The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.

Why do we use coils with more turns than turns?

I.e. current should pass thinner wire and longer length of this wire. in the case. This obviously means, that the more turns we have, the higher voltage should be applied. Hence, the less turns the coil has, the better magnetic properties it has. Then why use coils with many turns?

Why is the magnetic field around a coil stronger than the wire?

The magnetic field becomes stronger because the magnetic field around a wire is circular and vertical to the wire, but the magnet fields from each of the turns in the coil add together, so the total magnetic field is much stronger.

How does the resistance of a coil affect the current?

Any which have higher resistance receive less current, effectively decreasing the number of windings you have. In a typical wire-wound approach, all such a coil would do is increase the total resistence of the system so that we have to apply more voltage to arrive at the same current.

How does the number of turns of wire affect inductance?

Number of Wire Wraps, or “Turns” in the Coil All other factors being equal, a greater number of turns of wire in the coil results in greater inductance; fewer turns of wire in the coil results in less inductance.