Author: admin
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Relationship Between Wavelength and Frequency
The wavelength of a wave is inversely proportional to its frequency. If v represents the velocity of a wave, its frequency f, and its wavelength λ�, then; λ=vf�=�� This means, as wavelength increases, the frequency will decrease and vice versa. In the case of light in a vacuum, this formula is given as λ�=cν
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Definitions & Practice Questions
Wavelength and frequency are two important characteristics to explain the nature of a wave. Wavelength is basically the measure of the distance between two successive points referred to as crests or troughs of a wave. It is always measured in the direction of the wave and is represented by the symbol λ�. Since it is…
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Practice Questions
If you want to check out the different practice questions and their solutions, you can refer to the Vedantu notes on heat capacity formulas. Here you will find a wide comprehensive explanation of the concept, a wide range of examples, and an array of practice questions with solutions including multi choice questions. The solved practice…
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Solved Examples & Practice Question
When the heat is absorbed by a body, its temperature increases, and when the body discharges or loses heat, its temperature falls. The heat capacity is the heat needed for raising the temperature of an object by a calculation of one degree. It can also be calculated as a ratio of the amount of heat…
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The Importance of Gravity
The law of gravity applies to almost everything in the universe. Any two objects pull together like any other two galaxies. In addition, the attractions are small, even zero sometimes, when the distance is large enough. You can find your value in the way all the stories come together. For example, you may have seen…
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Formula of Gravity
Gravity or Gravitation is a phenomenon which gives an idea about the existence of a force between any two objects having some mass. The force due to gravity is always attractive. Law of Gravity states that if two masses, m1 and m2, are kept at a distance of r from each other, then force due…
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Gravity on The Earth
Gravity is very important to us. It’s impossible to live on Earth without gravity. The gravitational force of the sun keeps the Earth in orbit around it, keeping us far away from the sun and heat. It holds our atmosphere and the air we need to breathe. Gravity is what holds our earth together. On…
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Practice Questions
Ans: According to Faraday’s law when the magnetic flux linking a circuit changes, an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage. So, when rectangular coil is rotated in a uniform magnetic field about an axis passing through its centre and perpendicular to the direction of…
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Magnetic Properties of Electricity flowing through a Wire
As a child, you must all have played with a magnet. It is a material that attracts iron or ferrous objects. Chromium and Nickel are the other two objects that are attracted to magnets. Later when the characteristics of a magnet were discovered it was found that in the magnet there exist two poles at…
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Solved Examples
Solution: B = 2.5 T, r = 2 cm = 2 × 10–2 m, θ = 0, ΦB=?ΦB=BAcosθ=2.5×π(2×10−2)2×cos0=3.14×10−3WbΦ�=?Φ�=������=2.5×�(2×10−2)2×���0=3.14×10−3�� Solution: B = 1 T, A = 10–2 m2, θ=60∘,n=100,ΦB=?ΦB=nBAcosθ=100×1×10(−2)×cos60∘=0.5Wb�=60∘,�=100,Φ�=?Φ�=�������=100×1×10(−2)×���60∘=0.5�� Options: (a) maximum and minimum once each (b) maximum and minimum twice each (c) maximum once, minimum twice (d) maximum twice, minimum once Answer: (b)