SI unit of electric current is ampere (A). Ampere is the flow of electric charges through a surface at the rate of one coulomb per second, i.e. if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere. Therefore, 1 ampere =Â 1C/1s
SI unit of electric current is ampere (A).
Ampere is the flow of electric charges through a surface at the rate of one coulomb per second, i.e. if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere.
Therefore, 1 ampere =Â 1C/1s
In an electric motor, after every half rotation the direction of coil gets reversed due to change in orientation of the magnetic field. To ensure a continuous rotation; a split ring is attached to the coil so that the polarity of the coil changes after every half rotation. This changes the directionRead more
In an electric motor, after every half rotation the direction of coil gets reversed due to change in orientation of the magnetic field. To ensure a continuous rotation; a split ring is attached to the coil so that the polarity of the coil changes after every half rotation. This changes the direction of current and thus the armature keeps on rotating continuously.
Aerobic respiration In most of the plants and the animals, respiration occurs by the use of molecular oxygen and release of carbon dioxide, this phenomena is known as aerobic respiration. The organisms which carry aerobic respiration are known as aerobes. Gases are exchanged in this type of respiratRead more
Aerobic respiration
In most of the plants and the animals, respiration occurs by the use of molecular oxygen and release of carbon dioxide, this phenomena is known as aerobic respiration.
The organisms which carry aerobic respiration are known as aerobes.
Gases are exchanged in this type of respiration.
And, their metabolism occurs in cytoplasm or mitochondria.
Glucose gets broken down into the carbon dioxide, water and energy is released in the form of ATP. It yields more energy available in glucose.
Examples:- all higher organisms like mammals and plants, sponges, flatworms, roundworms etc. have this type of respiration.
Anaerobic respiration
n some organisms, respiration occurs without the use of molecular oxygen and it may or may not involve the production of carbon dioxide, this phenomena is known as anaerobic respiration.
The organisms which carry anaerobic respiration are known as anaerobes.
Gases are not exchanged in this type of respiration.
Their metabolism occurs in only cytoplasm.
In this glucose breaks down into ethyl alcohol and carbon dioxide without using oxygen, also known as alcoholic fermentation and lactic acid fermentation. And it yields only 5% energy available in glucose.
Alcoholic fermentation or yeast oxidization:-
Examples:- lower organisms like bacteria and yeast have this type of respiration. In bacteria, glucose breaks down into lactic acid and energy without the use of oxygen and without the production of carbon dioxide.
Necessary conditions for autotrophic nutrition : (i) Presence of chlorophyll in the living cells. (if) Provision of supply of water to green plants or cells of the plant. (iii) Sufficient sunlight. (iv) Sufficient supply of carbon dioxide. By-product of auto tropic nutrition is oxygen
Necessary conditions for autotrophic nutrition :
(i) Presence of chlorophyll in the living cells.
(if) Provision of supply of water to green plants or cells of the plant.
(iii) Sufficient sunlight.
(iv) Sufficient supply of carbon dioxide.
By-product of auto tropic nutrition is oxygen
An electric lamp of 100 ohm, a toaster of resistance 50 ohm, and a water filter of resistance 500 ohm are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?
Given: R1 = 100Ω, R2 = 50 Ω, R3 = 500 Ω all are connected in parallel Potential difference = 220V Thus, 1/R=1/100Ω+1/50Ω+1/500Ω=(5+10+1)/500Ω=16/500Ω Therefore, R=500/16Ω=31.25Ω Electric current (I) through the circuit = V/R ⇒I=220V/31.25Ω=7.04A For electric iron Since it takes as well current as thRead more
Given:
See lessR1 = 100Ω, R2 = 50 Ω, R3 = 500 Ω all are connected in parallel
Potential difference = 220V
Thus, 1/R=1/100Ω+1/50Ω+1/500Ω=(5+10+1)/500Ω=16/500Ω
Therefore, R=500/16Ω=31.25Ω
Electric current (I) through the circuit =Â V/R
⇒I=220V/31.25Ω=7.04A
For electric iron
Since it takes as well current as three appliances, thus electric current through it = 7.04A
The electric current = 7.04 A and potential difference = 220 V
Thus, Resistance of electric iron = Total resistance of three appliances = 31.25 Ω
Thus, electric current through the electric iron = 7.04A
Resistance of electric iron = 31.25 Ω
Define the unit of current.
SI unit of electric current is ampere (A). Ampere is the flow of electric charges through a surface at the rate of one coulomb per second, i.e. if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere. Therefore, 1 ampere =Â 1C/1s
SI unit of electric current is ampere (A).
Ampere is the flow of electric charges through a surface at the rate of one coulomb per second, i.e. if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere.
See lessTherefore, 1 ampere =Â 1C/1s
What is the role of the split ring in an electric motor?
In an electric motor, after every half rotation the direction of coil gets reversed due to change in orientation of the magnetic field. To ensure a continuous rotation; a split ring is attached to the coil so that the polarity of the coil changes after every half rotation. This changes the directionRead more
In an electric motor, after every half rotation the direction of coil gets reversed due to change in orientation of the magnetic field. To ensure a continuous rotation; a split ring is attached to the coil so that the polarity of the coil changes after every half rotation. This changes the direction of current and thus the armature keeps on rotating continuously.
See lessWhat are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
Aerobic respiration In most of the plants and the animals, respiration occurs by the use of molecular oxygen and release of carbon dioxide, this phenomena is known as aerobic respiration. The organisms which carry aerobic respiration are known as aerobes. Gases are exchanged in this type of respiratRead more
Aerobic respiration
Anaerobic respiration
- n some organisms, respiration occurs without the use of molecular oxygen and it may or may not involve the production of carbon dioxide, this phenomena is known as anaerobic respiration.
- The organisms which carry anaerobic respiration are known as anaerobes.
- Gases are not exchanged in this type of respiration.
- Their metabolism occurs in only cytoplasm.
- In this glucose breaks down into ethyl alcohol and carbon dioxide without using oxygen, also known as alcoholic fermentation and lactic acid fermentation. And it yields only 5% energy available in glucose.
- Examples:- lower organisms like bacteria and yeast have this type of respiration. In bacteria, glucose breaks down into lactic acid and energy without the use of oxygen and without the production of carbon dioxide.
See lessAlcoholic fermentation or yeast oxidization:-
What are the necessary conditions for autotrophic nutrition and what are its by products?
Necessary conditions for autotrophic nutrition : (i) Presence of chlorophyll in the living cells. (if) Provision of supply of water to green plants or cells of the plant. (iii) Sufficient sunlight. (iv) Sufficient supply of carbon dioxide. By-product of auto tropic nutrition is oxygen
Necessary conditions for autotrophic nutrition :
See less(i) Presence of chlorophyll in the living cells.
(if) Provision of supply of water to green plants or cells of the plant.
(iii) Sufficient sunlight.
(iv) Sufficient supply of carbon dioxide.
By-product of auto tropic nutrition is oxygen