notes of electricity chapter of class 10
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Current:
I = Q/t, Where I = Current
Q = Net charge flowing.
t = time
• Unit:
The unit of current is Ampere.
Q = Coulomb(C)
I = Ampere(A)
t = Second(s) 1 A = 1C/1s
Potential Difference:
The potential difference between two separate points is defined as the work done to move a unit positive charge from one point to another.
V = W/Q
• Unit:
The unit of potential difference is Volt
1 Volt = 1 Joule/ 1 Coulomb
Ohm’s Law:
Current ∝ potential difference
V ∝ I
V = I R where, R = Resistance
• Unit:
R = Ω(Ohm)
1Ω = 1V / 1 A
• Factors on which resistance depends:
○ R ∝ 1, when A and material constant l = length
○ R ∝ 1/ A, when l and material constant A = perpendicular cross-section
R ∝l / A,
R = ρl / A, where ρ = resistivity
• Resistivity: Resistivity of a substance is equal to the resistance of a unit square of that substance.
Its Unitis Ωm.
Resistance in a series connection:
R = R1 + R2 + R3 + … + Rn Buy air-conditioning and refrigeration equipment that do not use HCFCs as refrigerant. Buy aerosol products that do not use HCFCs or CFCs as propellants. Conduct regular inspection and maintenance of air-conditioning and refrigeration appliances to prevent and minimize refrigerant leakage. Snow, sea, cloud—it's not often you see what look like the three main states of matter (solid, liquid, and gas) in the same place, at the same time. ... What makes something solid, liquid, or gas? ... Gases have much more randomly arranged atoms than either liquids or solids. Resistance in parallel: Heating Effect of current:
Electric energy = VIt
Heat, H = VIt = I2Rt
• Application:
Electric iron, toaster, fused wire, etc.
Fused wire: a low-melting point wire connected in series with electric devices for safety.
Electric power:
P = VI = I2R = V2/ R
• Unit: 1 kWh = 3.6 × 106J
1 W = 1V × 1A
Ohm’ law: Under constant physical conditions (i.e., constant temperature, pressure etc.), the current flowing through a conductor is directly proportional to the potential difference across the conductor.
Potential difference (which is measured in Voltage) is the cause of current (which is measured in Ampere).
In conductors, flow of electrons constitute current. In a circuit current flow from positive terminal of the battery to the negative terminal, but electrons travels from negative terminal to the positive terminal. The negative terminal of a battery is said to be at lower potential and the positive terminal is said to be at higher potential. When a battery is not connected to any circuit, the potential difference across the terminals of the battery is equal to the EMF of the battery. (EMF = Electro Motive Force). Electromotive force, also called EMF, (denoted and measured in volts), refers to voltage generated by a battery or by the magnetic forceaccording to Faraday's Law, which states that a time varying magnetic field will induce an electric current.
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I = Q/t, Where I = Current
Q = Net charge flowing.
t = time
• Unit:
The unit of current is Ampere.
Q = Coulomb(C)
I = Ampere(A)
t = Second(s) 1 A = 1C/1s
Potential Difference:
The potential difference between two separate points is defined as the work done to move a unit positive charge from one point to another.
V = W/Q
• Unit:
The unit of potential difference is Volt
1 Volt = 1 Joule/ 1 Coulomb
Ohm’s Law:
Current ∝ potential difference
V ∝ I
V = I R where, R = Resistance
• Unit:
R = Ω(Ohm)
1Ω = 1V / 1 A
• Factors on which resistance depends:
○ R ∝ 1, when A and material constant l = length
○ R ∝ 1/ A, when l and material constant A = perpendicular cross-section
R ∝l / A,
R = ρl / A, where ρ = resistivity
• Resistivity: Resistivity of a substance is equal to the resistance of a unit square of that substance.
Its Unitis Ωm.
Resistance in a series connection:
R = R1 + R2 + R3 + … + Rn Buy air-conditioning and refrigeration equipment that do not use HCFCs as refrigerant. Buy aerosol products that do not use HCFCs or CFCs as propellants. Conduct regular inspection and maintenance of air-conditioning and refrigeration appliances to prevent and minimize refrigerant leakage. Snow, sea, cloud—it's not often you see what look like the three main states of matter (solid, liquid, and gas) in the same place, at the same time. ... What makes something solid, liquid, or gas? ... Gases have much more randomly arranged atoms than either liquids or solids. Resistance in parallel: Heating Effect of current:
Electric energy = VIt
Heat, H = VIt = I2Rt
• Application:
Electric iron, toaster, fused wire, etc.
Fused wire: a low-melting point wire connected in series with electric devices for safety.
Electric power:
P = VI = I2R = V2/ R
• Unit: 1 kWh = 3.6 × 106J
1 W = 1V × 1A
Ohm’ law: Under constant physical conditions (i.e., constant temperature, pressure etc.), the current flowing through a conductor is directly proportional to the potential difference across the conductor.
Potential difference (which is measured in Voltage) is the cause of current (which is measured in Ampere).
In conductors, flow of electrons constitute current. In a circuit current flow from positive terminal of the battery to the negative terminal, but electrons travels from negative terminal to the positive terminal. The negative terminal of a battery is said to be at lower potential and the positive terminal is said to be at higher potential. When a battery is not connected to any circuit, the potential difference across the terminals of the battery is equal to the EMF of the battery. (EMF = Electro Motive Force). Electromotive force, also called EMF, (denoted and measured in volts), refers to voltage generated by a battery or by the magnetic forceaccording to Faraday's Law, which states that a time varying magnetic field will induce an electric current.
plzzzzzzzzzzz mark as brainliest if it helped you
I have to get my rank
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