important points of chapter electricity class 10.
write in simple language.
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9
Understand the concept of electricity properly.
Definition and units of electric potential, potential difference, resistance, resistivity, conductance, conductivity, etc. are important.
Which wire is made of which material is important (eg. bulb filament is made up of Tungsten and heating element is made up of nichrome, etc).
How to find equivalent resistance of series combination as well as parallel combination is important.
Definition and units of electric potential, potential difference, resistance, resistivity, conductance, conductivity, etc. are important.
Which wire is made of which material is important (eg. bulb filament is made up of Tungsten and heating element is made up of nichrome, etc).
How to find equivalent resistance of series combination as well as parallel combination is important.
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Positive and negative charges: The charge acquired by a glass rod when rubbed with silk is
called positive charge and the charge acquired by an ebonite rod when rubbed with wool is called negative charge.
2. Coulomb: It is the S.I. unit of charge. One coulomb is defined as that amount of charge which repels an equal and similar charge with a force of 9 x 109 N when placed in vacuum at a distance of 1 meter from it.
Charge on an electron = -1.6 x 10-19 coulomb.
3. Static and current electricities: Static electricity deals with the electric charges at rest while the current electricity deals with the electric charges in motion.
4. Conductor: A substance which allows passage of electric charges through it easily is called a
‗conductor‘. A conductor offers very low resistance to the flow of current. For example copper,silver, aluminium etc.
5. Insulator: A substance that has infinitely high resistance does not allow electric current to flow through it. It is called an ‗insulator‘. For example rubber, glass, plastic, ebonite etc.
6. Electric current: The flow of electric charges across a cross-section of a conductor constitutes an electric current. It is defined as the rate of flow of the electric charge through any section of a conductor. Electric currentharge/Time or I = Q/t Electric current is a scalar quantity.
7. Ampere: It is the S.I. unit of current. If one coulomb of charge flows through any section of a conductor in one second, then current through it is said to be one ampere.
1 ampere = 1 coulomb/1 second or 1 A = 1C/1s = 1Cs-1
1 milliampere = 1 mA = 10-3 A
1 microampere = 1µA = 10-6 A
called positive charge and the charge acquired by an ebonite rod when rubbed with wool is called negative charge.
2. Coulomb: It is the S.I. unit of charge. One coulomb is defined as that amount of charge which repels an equal and similar charge with a force of 9 x 109 N when placed in vacuum at a distance of 1 meter from it.
Charge on an electron = -1.6 x 10-19 coulomb.
3. Static and current electricities: Static electricity deals with the electric charges at rest while the current electricity deals with the electric charges in motion.
4. Conductor: A substance which allows passage of electric charges through it easily is called a
‗conductor‘. A conductor offers very low resistance to the flow of current. For example copper,silver, aluminium etc.
5. Insulator: A substance that has infinitely high resistance does not allow electric current to flow through it. It is called an ‗insulator‘. For example rubber, glass, plastic, ebonite etc.
6. Electric current: The flow of electric charges across a cross-section of a conductor constitutes an electric current. It is defined as the rate of flow of the electric charge through any section of a conductor. Electric currentharge/Time or I = Q/t Electric current is a scalar quantity.
7. Ampere: It is the S.I. unit of current. If one coulomb of charge flows through any section of a conductor in one second, then current through it is said to be one ampere.
1 ampere = 1 coulomb/1 second or 1 A = 1C/1s = 1Cs-1
1 milliampere = 1 mA = 10-3 A
1 microampere = 1µA = 10-6 A
saniya63:
in point no. 6 you left the sign of equal to
electric current = charge / time
plz correct it
and thank you so much it is very helpful for me
welcome ji
ek insan hi dusra insan k kaam aata ha
absolutely right
thnx
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