BASIC ELECTRICAL QUESTION & ANSWER
1. What is current & its unit?
❖ The flow of electrons in a closed circuit or conductor is known as Current.
❖ Its unit is Ampere(I)
2. What is voltage & its unit?
❖ Voltage is the potential difference between two electric charges, known as voltage.
❖ Its unit is volt.
3. What is resistance & its unit?
❖ It is the properties of resistors.
❖ It opposes the flow of current in a circuit.
❖ Its unit is ohm (Ω)
4. What is power & its unit.?
❖ Power is the rate at which electrical energy is transferred by an electric circuit.
❖ Its unit is watt(W)
5. What is ohms law.?
❖ Ohms law states that in a closed-circuit Current is directly proportional to the
voltage and inversely proportional to resistance at a constant temperature.
❖ V=IR
6. What is multimeter.?
❖ It’s a measuring instrument through which we can measure multiple electrical
parameters like current, voltage, resistance, capacitance, etc.
7. What is an atom?
❖ It is the smallest particle of substance.
❖ It does not contain all the physical and chemical properties of that substance, but it
can take part in chemical reactions but cannot exit freely.
❖ It consists of 3 particles electrons, protons, and neutrons.
8. What is an molecule?
❖ Molecules are the smallest particles of matter which contain all the physical and
chemical properties of that matter.
9. What is an electron.?
❖ Electrons are the negative charge particle of atom. (-ve)
10.What is proton.?
❖ Protons are the positive charge particle of atom. (+ve)
11.What is Nucleus?
❖ The center part of the atom is called nucleus.
❖ It has protons and neutrons.
12.What is conductor.?
❖ Through which substance electricity can flow easily is known as conductor.
❖ For example, copper, aluminum, silver, etc.
13.What is insulator.?
❖ Through which substance electricity cannot flow through is known as insulator.
❖ For example, plastic, rubber, paper, wood, etc.
14.Write 2 laws of resistance?
❖ The Resistance “R” is directly proportional with its length “L.”
❖ The Resistance “R” is Inversely proportional with its Cross-Sectional Area: “A”
15.What ae the states of matter?
There are four states of matter.
❖ Solid
❖ Liquid
❖ Gas
❖ Plasma