What is an electric current Mcq?
The quantity of charge passing through a given point of the conductor in one second is called electric current. SI unit – Ampere.
What are some good electricity Questions?
Electricity Questions
- Could electronic devices charge themselves without being plugged into an electricity source?
- Does a source of electricity ever run out of electrons?
- How much money do I save by recharging my cell phone at work?
- What is the speed of electricity?
- Why can’t lightning strike the same place twice?
What is the definition of current Mcq?
Current – Definition The definition of electric current is flow of electrons or movement of electric charge. The SI unit of current is ampere.
What is responsible for the current to flow Mcq?
Answer. Answer: Free electrons are responsible for current in the conductors.
Does static electricity have current?
Static electricity is named in contrast with current electricity, where the electric charge flows through an electrical conductor or space, and transmits energy.
Is electric current scalar or vector?
scalar quantity
Electric Current is the rate of flow of electrons in a conductor. The SI Unit of electric current is the Ampere. Electric current is a scalar quantity. Any physical quantity is termed as a vector quantity when the quantity has magnitude and direction.
Why is current important?
Current is one of the most important and fundamental elements within electrical and electronic technology. The current flowing in a circuit can be used in a variety of ways from generating heat to causing circuits to switch, or information to be stored in an integrated circuit.
What is the unit of current flow?
ampere
At its most basic, current = flow. An ampere (AM-pir), or amp, is the international unit used for measuring current. It expresses the quantity of electrons (sometimes called “electrical charge”) flowing past a point in a circuit over a given time.
How is current measured?
Current can be measured using an ammeter. Electric current can be directly measured with a galvanometer, but this method involves breaking the electrical circuit, which is sometimes inconvenient. Current can also be measured without breaking the circuit by detecting the magnetic field associated with the current.
Can the current be negative?
Current can be positive or negative in an ideal wire or superconductor without the existence of a voltage difference between two points on the conductor.
What is an electric current?
An electric current is a flow of electric charge. In electric circuits, this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma). 1. The current through a metallic conductor is due to the motion of D.
What do you mean by electric circuit?
A continuous and closed path of an electric current is called an electric circuit. The direction of the current is taken opposite to the direction of the flow of electrons. The electric current is expressed by a unit called ampere (A).
What do you mean by electric power?
The rate, per unit time, at which work is being done on an electric circuit is known as electric power. Power is measured in Watts. Electrical resistance is the measure of the opposition to current flow in an electrical circuit, it is measured in ohms.
Do all liquids conduct electricity?
Some liquids are good conductors of electricity and some are poor conductors. Most liquids that conduct electricity are solutions of acids, bases and salts. The passage of an electric current through a conducting liquid causes chemical reactions.