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Calculate the total number of electrons flowing through a circuit in 20 minutes and 40 seconds if a current of 40 mA flows through the circuit?
Wiki User
∙ 13y ago
The current in a circuit is a measure of passing electrical charge per second. Each electron carries a fix amount of charge. Therefore the number of charge moving depends on the speed of the charge, in this case electrons. In conductors like copper, there are just so many free electrons that they move in bulk slower than snail.
The the Cathode ray tube, the speed is at a fraction of speed of light, not many electrons are flying.
For actual number, look up speed of electron in copper at room temperature, and multiple the electrical charge constant to get at the current. This must be a standard class tutorial.
Wiki User
∙ 13y ago
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Does electricity get used up when flowing in a circuit?
The free electrons flowing in the circuit decrease.
The unit of current in which 6240000000000000000 electrons flow past a given point in a circuit in one second is the?
The amount of current is measured in units called amperes or amps. One ampere of current is equal to the charge of 6,240,000,000,000,000,000 electrons flowing past a given point in a circuit per second Its in the Penn Foster Book.
When you increase current in a circuit do you have more electrons flowing or are the electrons going faster?
Look at is from a waterfall point of view. If there is more current, is the water flowing faster or is there more water? (If you do not catch on, there is more water and for your question, more electrons.) Electroncs cannot travel faster, they travel at the same speed, and they reach destination faster or slower depending on resistance.
A W bulb and a W bulb are connected in series in a circuit Which bulb has the greater current flowing in it?
A series circuit is where there is only one path for the current. As a result, and as a direct consequence of Kirchoff's current law, the current at every point in a series circuit is the same. The two bulbs have the same current flowing through them.
When does current stop flowing in a circuit?
Current flows in a circuit when there is a difference in electronic potential between two points.
Is true if there is voltage in circuit there must be electrons flowing through the circuit.?
No. For electrons to flow, you need a current.
Is somthing that flows through an electric circuit an eletrical current?
Yes. Current consists of electrons flowing in a circuit.
What force keep current flowing?
Voltage is the pressure that moves the electrons (current) through a circuit.
Does electricity get used up when flowing in a circuit?
The free electrons flowing in the circuit decrease.
What is a circuit called if its operating and the current is flowing?
This is called a closed circuit. If current was not flowing, it would be open.
What goes around a circuit?
Charge, in the form of electrons, flow through a circuit. This is called electric current. 1 amp = 1 coulomb of charge per second flowing past a point in the circuit.
What kind of force keeps current flowing in a circuit?
EMF (voltage) is the force that keeps current flowing in a circuit.
Why is it that the current flowing through a parallel circuit is the different in all parts of the circuit?
Because there is many path for flowing current through circuit.
When is the current flowing in a circuit said to be very small?
When the current flowing in a circuit is very small the resistance will be very high.
What is he definition of electrical current?
The current flowing in an electrical circuit.
What flows through a circuit and causes a magnetic field?
An electric current flowing through a circuit causes a magnetic field. This is due to the movement of electric charges, usually electrons, in the circuit. The magnetic field produced is perpendicular to the direction of the current flow.
What can be used to test if electricity is flowing in a circuit?
A Galvanometer can be used to detect the presence of current in a circuit. An ammeter can be used to know the magnitude of the current flowing through the circuit.
