Series combination of resistors class 10 | 10th class physics | punjab, kpk, federal, balochistan
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Series combination of resistors 10th
Series combination of resistors 10th class physics chapter 14 | combination of resistors in urdu
14.9 COMBINATION OF RESISTORS
(i) Series combination (ii) Parallel combination
Resistors can be connected in two ways.
(i) Series Combination
In series combination, resistors are connected end to end
(Fig. 14.12) and electric current has a single path through the
circuit. This means that the current passing through each
resistor is the same.
Equivalent Resistance of Series Circuit
The total voltage in a series circuit divides among the
individual resistors so the sum of the voltage across the
resistance of each individual resistor is equal to the total
voltage supplied by the source. Thus, we can write as
where V is the voltage across the battery, and
voltages across resistors R
, R and R respectively. If I is the
current passing through each resistor, then from Ohm's law
We can replace the combination of resistors with a single
resistor called the equivalent resistance R such that the e
same current passes through the circuit. From Ohm's law
V= I Re
Thus, the equivalent resistance of a series combination is
equal to the sum of the individual resistances of the
ii) Parallel Combination
In parallel combination one end of each resistor is connected
with positive terminal of the battery while the other end of
each resistor is connected with the negative terminal of the
battery (Fig.14.13). Therefore, the voltage is same across
each resistor which is equal to the voltage of the battery i.e.,
Equivalent Resistance of Parallel Circuit
In parallel circuit, the total current is equal the sum of the
currents in various resistances
Since the voltage across each resistance is V, so by Ohm's law
102
Point to ponder!
A bird can sit harmlessly on
high tension wire. But it must
n o t r e a c h a n d g r a b
neighboring wire. Do you
know why?
CURRENT ELECTRICITy
The time rate of flow of electric charge through any cross section is called electric
current.
The current due to flow of positive charge which is equivalent to current due to flow
of negative charge in opposite direction is known as conventional current.
Ampere is the SI unit of current.
e.m.f. is the total amount of energy supplied by the battery or the cell in moving a
one coulomb of positive charge from the -ve to the +ve terminal of the battery.
Ohm's law states that the current I passing through a conductor is directly
proportional to the potential difference V applied across its ends provided the
temperature and physical state of the conductor do not change.
Resistance R is a measure of opposition to the flow of current through a conductor.
Its SI unit is ohm. It is denoted by the symbol Ω. When a potential difference of one
volt is applied across the ends of a conductor and one ampere of current passes
through it, then its resistance will be one ohm.
Materials in which electrons can freely move so as to pass electricity are called
conductors while in insulators no free electrons are available for the conduction of
electricity.
The equivalent resistance R of a series combination of ‘n’ resistances is given by e
The equivalent resistance R of a parallel combination of ‘n’ resistances is given by e
Galvanometer is a sensitive instrument which detects current in a circuit. It is always
connected in series with the circuit.
Ammeter is an electrical instrument which measures larger current. It is always
connected in series in a circuit.
Voltmeter is an electrical instrument used to measure potential difference between
two points in a circuit. It is always connected parallel to a circuit component.
amount of heat energy generated in a resistance due to flow of electric current
is equal to the product of the square of current, resistance and the time interval ( W
2
= I Rt). This is called Joule's law.
kilowatt-hour is the amount of energy obtained from a source of one kilowatt in one
hour. It is equal to 3.6 mega joule.
The current which does not change its direction of flow is known as direct current or
d.c.
The current which changes its direction of flow after regular intervals of time is
known as alternating current or a.c.
Related searches
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9. Series combination 10th physics
Foundation sabaq academy khan haythem brain magnet physics wallah sabaq 10th class.
#seriesresistors
#seriescombinationofresistors
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#10thphysics
#combinationofresistors
14.9 COMBINATION OF RESISTORS
(i) Series combination (ii) Parallel combination
Resistors can be connected in two ways.
(i) Series Combination
In series combination, resistors are connected end to end
(Fig. 14.12) and electric current has a single path through the
circuit. This means that the current passing through each
resistor is the same.
Equivalent Resistance of Series Circuit
The total voltage in a series circuit divides among the
individual resistors so the sum of the voltage across the
resistance of each individual resistor is equal to the total
voltage supplied by the source. Thus, we can write as
where V is the voltage across the battery, and
voltages across resistors R
, R and R respectively. If I is the
current passing through each resistor, then from Ohm's law
We can replace the combination of resistors with a single
resistor called the equivalent resistance R such that the e
same current passes through the circuit. From Ohm's law
V= I Re
Thus, the equivalent resistance of a series combination is
equal to the sum of the individual resistances of the
ii) Parallel Combination
In parallel combination one end of each resistor is connected
with positive terminal of the battery while the other end of
each resistor is connected with the negative terminal of the
battery (Fig.14.13). Therefore, the voltage is same across
each resistor which is equal to the voltage of the battery i.e.,
Equivalent Resistance of Parallel Circuit
In parallel circuit, the total current is equal the sum of the
currents in various resistances
Since the voltage across each resistance is V, so by Ohm's law
102
Point to ponder!
A bird can sit harmlessly on
high tension wire. But it must
n o t r e a c h a n d g r a b
neighboring wire. Do you
know why?
CURRENT ELECTRICITy
The time rate of flow of electric charge through any cross section is called electric
current.
The current due to flow of positive charge which is equivalent to current due to flow
of negative charge in opposite direction is known as conventional current.
Ampere is the SI unit of current.
e.m.f. is the total amount of energy supplied by the battery or the cell in moving a
one coulomb of positive charge from the -ve to the +ve terminal of the battery.
Ohm's law states that the current I passing through a conductor is directly
proportional to the potential difference V applied across its ends provided the
temperature and physical state of the conductor do not change.
Resistance R is a measure of opposition to the flow of current through a conductor.
Its SI unit is ohm. It is denoted by the symbol Ω. When a potential difference of one
volt is applied across the ends of a conductor and one ampere of current passes
through it, then its resistance will be one ohm.
Materials in which electrons can freely move so as to pass electricity are called
conductors while in insulators no free electrons are available for the conduction of
electricity.
The equivalent resistance R of a series combination of ‘n’ resistances is given by e
The equivalent resistance R of a parallel combination of ‘n’ resistances is given by e
Galvanometer is a sensitive instrument which detects current in a circuit. It is always
connected in series with the circuit.
Ammeter is an electrical instrument which measures larger current. It is always
connected in series in a circuit.
Voltmeter is an electrical instrument used to measure potential difference between
two points in a circuit. It is always connected parallel to a circuit component.
amount of heat energy generated in a resistance due to flow of electric current
is equal to the product of the square of current, resistance and the time interval ( W
2
= I Rt). This is called Joule's law.
kilowatt-hour is the amount of energy obtained from a source of one kilowatt in one
hour. It is equal to 3.6 mega joule.
The current which does not change its direction of flow is known as direct current or
d.c.
The current which changes its direction of flow after regular intervals of time is
known as alternating current or a.c.
Related searches
1. 10th physics chapter 14 combination of resistors
2. Combination of resistors 10th physics
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4. Combination of resistors 10 physics
5. Combination of resistors 10 physics
6. Series combination 10th physics
7. Series combination 10th class physics chapter 14
8. 10th class physics chapter 14 series combination of resistors
9. Series combination 10th physics
Foundation sabaq academy khan haythem brain magnet physics wallah sabaq 10th class.
#seriesresistors
#seriescombinationofresistors
#resistorsinseries
#10thphysics
#combinationofresistors
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