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What is the range of Electromagnetic Force ?
The correct answer is Infinite The correct answer is (4) Infinite. The electromagnetic force is one of the fundamental forces of nature, and it has an infinite range. This means that it can act over any distance, regardless of how large or small. The electromagnetic force is responsible for interactRead more
The correct answer is Infinite
The correct answer is (4) Infinite.
The electromagnetic force is one of the fundamental forces of nature, and it has an infinite range. This means that it can act over any distance, regardless of how large or small. The electromagnetic force is responsible for interactions between charged particles, such as electrons and protons, and it also governs the behavior of electromagnetic waves, such as light.
Unlike some other forces, such as the strong nuclear force or the weak nuclear force, which have short ranges and act only within the atomic nucleus or on subatomic scales, the electromagnetic force can act over long distances. This is why we can observe the effects of electric and magnetic fields over significant distances.
For example, the electromagnetic force is responsible for the attraction or repulsion between charged objects, even if they are far apart. It also allows for the transmission of radio waves, microwaves, visible light, and other forms of electromagnetic radiation across vast distances.
Therefore, the range of the electromagnetic force is infinite, making option (4) the correct choice.
See lessThe position of a particle moving along x – axis in given by x = 10t – 2t². Then the time(t) at which it will momently come to rest is : (A) zero (B) 3.5s (C) 2.5s (D) 10s
The correct answer is C To find the time at which the particle momentarily comes to rest, we need to determine the velocity of the particle and find the time when the velocity is zero. Given that the position of the particle along the x-axis is given by the equation x = 10t - 2t². To find the velociRead more
The correct answer is C
To find the time at which the particle momentarily comes to rest, we need to determine the velocity of the particle and find the time when the velocity is zero.
Given that the position of the particle along the x-axis is given by the equation x = 10t – 2t².
To find the velocity, we differentiate the position equation with respect to time (t):
v = dx/dt = d/dt(10t – 2t²)
v = 10 – 4t
Now we can find the time at which the velocity is zero by setting v = 0 and solving for t:
10 – 4t = 0
4t = 10
t = 10/4
t = 2.5 seconds
Therefore, the time at which the particle momentarily comes to rest is 2.5 seconds.
Hence, the answer is (C) 2.5s.
See lessNCERT Class 7 Civics: Chapter 10, Question Exercise Q.5
The Constitution plays a vital role in promoting the struggle for equality among people. The Constitution is a set of fundamental principles and laws that govern a country's political and social system. It enshrines the basic rights and freedoms of citizens, irrespective of their caste, creed, gendeRead more
The Constitution plays a vital role in promoting the struggle for equality among people. The Constitution is a set of fundamental principles and laws that govern a country’s political and social system. It enshrines the basic rights and freedoms of citizens, irrespective of their caste, creed, gender, religion, or social status.
The Constitution provides a framework for promoting and protecting equality among people. It lays down the foundation for a democratic and egalitarian society, where every individual has an equal opportunity to participate in the political and social affairs of the country.
Furthermore, the Constitution sets out the framework for the functioning of the government and the judiciary, which are responsible for ensuring that the principles of equality and social justice are upheld. The Constitution provides for the establishment of independent institutions like the National Commission for Scheduled Castes, the National Commission for Scheduled Tribes, and the National Commission for Women to safeguard the rights and interests of marginalized communities.
In case of any violation of the principles of equality enshrined in the Constitution, the judiciary plays a crucial role in upholding the rights of the citizens. It provides a platform for people to seek redressal for any violation of their rights and to hold the government accountable for its actions.
Therefore, the Constitution acts as a catalyst for promoting the struggle for equality among people. It provides a framework for a just and equitable society, where every citizen has equal rights and opportunities, regardless of their social status or background.
See lessWhat is the need for laminating the core of a transformer?
The correct answer is To reduce the eddy currents The need for laminating the core of a transformer is to reduce the eddy currents that are generated in the core. Eddy currents are small circulating currents that flow within the core of a transformer due to the alternating magnetic field produced bRead more
The correct answer is To reduce the eddy currents
The need for laminating the core of a transformer is to reduce the eddy currents that are generated in the core. Eddy currents are small circulating currents that flow within the core of a transformer due to the alternating magnetic field produced by the windings. These currents cause energy losses and can lead to heating of the core.
Laminating the core involves constructing it using thin sheets of a magnetic material, such as silicon steel, which are insulated from each other. This helps to reduce the eddy currents, as the insulation between the laminations breaks up the continuous path that the currents would otherwise follow.
In addition to reducing eddy currents, laminating the core can also help to reduce hysteresis losses, which are caused by the magnetic domains in the core repeatedly reversing their alignment with the alternating magnetic field. However, reducing the resistance in the winding is not a direct benefit of laminating the core.
Therefore, option 2, to reduce eddy currents, is the correct answer.
See lessIn adult each testis measures
The correct answer is 4 to 5 cm width and 2 to 3 cm length In an adult, each testis measures approximately 4 to 5 cm in width and 2 to 3 cm in length. This measurement can vary slightly between individuals, but typically falls within this range. The testes are male reproductive organs responsible foRead more
The correct answer is 4 to 5 cm width and 2 to 3 cm length
In an adult, each testis measures approximately 4 to 5 cm in width and 2 to 3 cm in length. This measurement can vary slightly between individuals, but typically falls within this range.
The testes are male reproductive organs responsible for the production of sperm and the hormone testosterone. They are located in the scrotum, which is a sac of skin that hangs outside the body below the penis.
It is important to note that any significant deviation from the normal size of the testes could be indicative of a medical condition and should be evaluated by a healthcare professional.
See lessSertoli cells of testis
The correct answer is all of these Sertoli cells, also known as sustentacular cells, are specialized cells found in the testes. They play a crucial role in supporting the development of sperm cells. Option 4, "all of these", is correct. Sertoli cells provide nourishment to developing sperm by producRead more
The correct answer is all of these
Sertoli cells, also known as sustentacular cells, are specialized cells found in the testes. They play a crucial role in supporting the development of sperm cells.
Option 4, “all of these”, is correct. Sertoli cells provide nourishment to developing sperm by producing and secreting a variety of nutrients and growth factors. They also secrete the hormone inhibin, which helps to regulate the production of sperm in the testes.
In addition, Sertoli cells form the blood-testis barrier, which is a physical barrier that separates the developing sperm cells from the immune system of the body. This barrier helps to prevent the body’s immune system from attacking the developing sperm cells, which are genetically different from the rest of the body.
Furthermore, Sertoli cells also provide support and protection to the developing sperm cells by creating a supportive environment for their growth and development. They also help to remove damaged or defective sperm cells from the testes through a process called phagocytosis.
In summary, Sertoli cells perform multiple important functions in the testes, including providing nourishment, secreting hormones, forming the blood-testis barrier, and providing support and protection to developing sperm cells.
See lessOxalates and citrates are used as anticoagulants in stored blood because they:
The correct answer is Chelate calcium ions Oxalates and citrates are commonly used as anticoagulants in stored blood because they chelate calcium ions, which are essential for the coagulation (clotting) of blood. Option 1, "Chelate calcium ions", is the correct answer. Calcium ions play an importantRead more
The correct answer is Chelate calcium ions
Oxalates and citrates are commonly used as anticoagulants in stored blood because they chelate calcium ions, which are essential for the coagulation (clotting) of blood.
Option 1, “Chelate calcium ions”, is the correct answer. Calcium ions play an important role in the coagulation cascade, a complex process that leads to the formation of blood clots. By chelating calcium ions, oxalates and citrates prevent the coagulation cascade from being activated, thereby preventing the formation of blood clots in stored blood.
Option 2, “Act as competitive inhibitors of vitamin K”, is not correct. Vitamin K plays a role in the synthesis of several coagulation factors, but oxalates and citrates do not affect vitamin K function.
Option 3, “Potentiate anti-thrombin III”, is also not correct. Antithrombin III is a natural anticoagulant protein in the blood, but oxalates and citrates do not potentiate its activity.
Option 4, “Activate heparin”, is also not correct. Heparin is another commonly used anticoagulant, but oxalates and citrates do not activate its activity.
In conclusion, option 1, chelating calcium ions, is the correct answer as to why oxalates and citrates are used as anticoagulants in stored blood.
See less