2022-02-11 06:32:33
ELECTRICITY
*The rate of flow of charge through a conductor per second is called
Ans : Current
(Q - Quantity of charge t - charge flowing in second I - current)
*SI unit is of current
Ans : Ampere (A)
*Electric charge was first observed in a substance called
Ans : Amber
*Unit of electric charge
Ans : Coulomb
*1 coulomb (c) = 6.24 x 1018 electrons
*Charge of an electron = 1.6 x 10'19C
*The region which surrounds the electrically charged particles
Ans : Electric field
*The term electricity is coined by
Ans : Gilbert
*Law of electrolysis were formulated by
Ans : Michael Faraday
*The process of splitting up of a chemical substance when an electric current flows through it
Ans : Electrolysis
*A good conductor of electricity
Ans : Mercury
*The capacity of an electric field to do work on an electric charge
Ans : Electric potential
*Pure water is a bad conductor of electricity because pure water does not dissociate into
Ans : Ions
*Electro magnetism was discovered by
Ans : Hans Christian Oersted
*Positively charged particles lose
Ans : Electrons
*Negatively charged particles gain
Ans : Electrons
*Electricity is divided into two
Ans : (1)Static electricity
(2)Dynamic electricity
*The electric charge built upon a material as a static mode
Ans : Static electricity
*The type of electric charge flows from one point to another through the conductors, cables etc
Ans : Dynamic electricity
*Dynamic electricity are of two types
(a)Alternating current (AC)
(b)Direct current (DC)
ALTERNATING CURRENT (AC)
*It is the continuous flow of current
*It reverse its direction and magnitude with respect to time
*Electricity supplying for domestic use is
Ans : Alternating Current
DIRECT CURRENT (DC)
*Unidirectional flow of electric charge
Ans : Direct Current
*It does not reverse its direction with respect to time
*DC is formerly known as
Ans: Galvanic current
*Batteries, solar cells etc produce
Ans : DC
*AC is used more widely than DC
*The device used to convert AC to DC
Ans : Rectifiers
*The device used to convert DC to AC
Ans : Oscillator
*The device which conducts DC but blocks AC is
Ans : Inductor
*When one coulomb charge is carried from one place to another, the work done is called
Ans : Electric potential difference
*SI unit of electrical potential difference is
Ans : Volt
*The e.m.f or potential difference measured in volt is called
Ans : Voltage
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