Explain the mechanism by which AC (alternating current) through the primary circuit of a transformer produces an alternating voltage and current in the secondary coil. Then explain why this would or would not work with DC (nonalternating current) in the primary coil.
Answers
Answer:
It is based on the principle of electromagnetic induction.
Explanation:
When a magnetic flux linked with a coil changes, an induced emf and induced current is developed in the coil. This phenomenon is called electromagnetic induction.
AC current is time varying sinusoidal current, but DC current is steady current.
When an AC current pass through the primary coil of transformer, the magnetic flux linked with the coil changes. This magnetic flux is linked with the secondary coil which is placed near to the primary coil. As the flux changes in the secondary coil, the induced voltage and current is produced in the secondary coil of transformer.
In case of DC current, there is no changing flux because DC current is steady current, so DC current would not work in case of transformer.
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Answers
Answer:
The presence of minerals in a country can significantly impact its prosperity in various ways. Minerals, such as precious metals, rare earth elements, and energy resources like coal and oil, can play a pivotal role in a nation's economic development. First, mineral extraction and exportation can generate substantial revenue, contributing to the country's gross domestic product (GDP) and foreign exchange earnings. Additionally, the mining industry often creates job opportunities, fostering employment and income growth. However, the dependence on mineral resources can also lead to economic volatility and resource depletion if not managed sustainably. Moreover, the equitable distribution of wealth generated from mineral resources and effective governance are crucial factors in ensuring that the prosperity derived from these minerals benefits the entire population rather than a select few. Ultimately, the presence of minerals can be a double-edged sword, offering economic opportunities while demanding careful management to achieve lasting prosperity.
Explanation:
b. False
Answers
The correct answer is
b. False
It's actually the opposite: only a very small part of the electromagnetic spectrum is visible to human eye.
The electromagnetic spectrum consists of a huge range of wavelengths, spanning from gamma rays (with very short wavelength, at the order of 1 pm) to radio waves (with very long wavelength, at the order of kilometers). The only portion of this spectrum visible to the human eye is the "visible light", which has wavelengths between 400 and 700 nanometers approximately.
The statement is False. All the electromagnetic radiations are not visible to the human eyes.
Explanation:
The waves are defined as the disturbance produced in the medium particles. The wave is basically the physical phenomena that occurs in a medium and it is characterized by the amplitude, wavelength and the frequency of oscillating particles.
The waves are basically characterized as the transverse and the longitudinal based on the direction of oscillation. The transverse waves are the one in which the direction of oscillation is perpendicular to the propagation whereas in longitudinal waves, the direction of oscillation is along the motion of the wave.
The electromagnetic waves are the transverse waves that are formed by the perpendicular magnetic and electric field present in the medium. The complete electromagnetic spectrum is not considered to be in the visible range for the human eye. Only a small part lying in the wavelength of .
Thus, The statement is False. All the electromagnetic radiations are not visible to the human eyes.
Learn More:
1. Similarities between transverse and longitudinal waves brainly.com/question/3293068
2. A property is a characteristic of a substance that can be observed and does not change the identity of the substance brainly.com/question/859623
3. The amount of kinetic energy an object has depends on its brainly.com/question/137098
Answer Details:
Grade: High School
Subject: Physics
Chapter: Waves
Keywords:
electromagnetic radiation, human eye, visible, transverse, longitudinal, waves, wavelength, particles, perpendicular.
B. d = wf
C. f = wd
D. f = dw
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w / d = F or w / F = d
If we multiply the denominator of the left hand side of the equation to the term in the right, we get the original equation.
B. 800 kg
C. 50 kg
D. 4802 kg
Answers
Answer:
C. 50 kg
Explanation:
Force of gravity on an object is the weight of the object and is given by mass times acceleration due to gravity. The acceleration due to gravity is the acceleration of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtons, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.
Answers
in all of science and technology, the cells referred to as "solar" perform
their function by deriving electrical energy from the energy in "solar" radiation.