What is the meaning of electric current?
Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have lost or gained one or more electrons), or holes (electron deficiencies that may be thought of as positive particles).
What is an electric circuit what makes an electric current flow in a wire?
(a) An electric current is a flow of electric charges (electrons) through a conductor. Potential difference between the ends of the wire makes electric current to flow in the wire.
What makes an electric charge to flow?
Electric current or electric charges flow because of the Coulomb’s force on them . The force is due to electric field. The field is created because of potential difference between two end points of a conductor.
What is the formula which relates electric charge time and electric current?
The current through a wire depends on time as, i=(10+4t) Here, i is in ampere and t is in seconds. Find the charge that crosses through a section in time interval between t=0 to t=1s.
How ammeter is connected in a circuit?
An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
Is the ammeter connected correctly?
Answer: To measure the total current, the ammeter must be placed at position 1, as all the current in the circuit must pass through this wire, and ammeters are always connected in series.
Why does an ammeter burn when connected in parallel?
Since most ammeter’s measure current through a very small internal resistance; when connected in parallel nearly all the current will travel through the ammeter loop rather than the circuit. This is because the current will choose the path of the least resistance. Hence the ammeter burns.