Question

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10. What is electric current? Mention the use of battery in an electric circuit. Write
the factors on which the resistance of a conductor depends.​

Answer 1

Question : 1

• What is electric current ?

Answer :-

• Electric current is the flow of charges through a conductor.

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Question :2

• Mention the use of battery in a electric circuit.

Answer :-

• Battery act as an external agency that provide energy to the charges to flow through the circuit.

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Question :3

• Write the factors on which resistance of conductor depends.

Answer :-

• Length of the conductor
• Cross sectional area of conductor
• Resistivity.

Answer 2

Answer:

An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface or into a control volume.[1]:2[2]:622 The moving particles are called charge carriers, which may be one of several types of particles, depending on the conductor. In electric circuits the charge carriers are often electrons moving through a wire. In semiconductors they can be electrons or holes. In a electrolyte the charge carriers are ions, while in plasma, an ionized gas, they are ions and electrons.[3]

Electric current

Ohm's Law with Voltage source TeX.svg

A simple electric circuit, where current is represented by the letter i. The relationship between the voltage (V), resistance (R), and current (I) is V=IR; this is known as Ohm's law.

Common symbols

I

SI unit

ampere

Derivations from

other quantities

{\displaystyle I={V \over R},I={Q \over t}}{\displaystyle I={V \over R},I={Q \over t}}

Dimension

{\displaystyle {\mathsf {I}}}{\displaystyle {\mathsf {I}}}

The SI unit of electric current is the ampere, or amp, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit[4]:15 Electric current is measured using a device called an ammeter.[2]:788

Electric currents create magnetic fields, which are used in motors, generators, inductors, and transformers. In ordinary conductors, they cause Joule heating, which creates light in incandescent light bulbs. Time-varying currents emit electromagnetic waves, which are used in telecommunications to broadcast information.