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Ask QuestionPosted by Aman???? Singh 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Induced current will be greater in copper loop because of its smaller resistance as compared to that of constantan loop.
Posted by Aman???? Singh 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
A metal disc is placed on the top of a magnet, as the electric current flows through the coil, an induced current in the form of eddies flows through the metal plate, the lower face attains the same polarity, and hence the metal disc is thrown up.
Posted by Rahul_ Ry(ʘ‿ʘ) 6 years, 1 month ago
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Ishika Gupta 6 years, 1 month ago
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Posted by Md Shoaib 6 years, 1 month ago
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Posted by Md Shoaib 6 years, 1 month ago
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Pragati Chaudhary 6 years, 1 month ago
Posted by Ankit Choudhary 6 years, 1 month ago
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Rajat Barwar 6 years, 1 month ago
Posted by Gopal Mishra 6 years, 1 month ago
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Posted by Pratyaksh Chaudhary 6 years, 1 month ago
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Posted by Mayuresh Sinha 6 years, 1 month ago
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Posted by Md Shoaib 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
The temperature at which magnetic properties of a substance change from ferromagnetic to paramagnetic is called Curie temperature. For example Gadolinium is ferromagnetic at temperatures below 19 °C (66 °F), approximately room temperature, and strongly paramagnetic above that temperature.
Posted by Md Shoaib 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Hard magnetic materials:These type of magnetic materials retain their magnetism in absence of magnetic field and also known as permanent magnets.They have high remnant magnetization, high coercivity, low initial permeability, Hysteresis loss is higher, Eddy current loss is more for metallic types and low for ceramic types. Alloys which are composed of iron, cobalt and aluminium are generally acted as hard magnetic materials.
Soft magnetic materials: These type of magnetic materials are those materials which have a smaller area enclosed by their Hysteresis loop. They have low remnant magnetization, low coercivity, high initial permeability, Hysteresis loss is less, Eddy current loss is less. The best examples of soft magnet are iron-silicon alloys, nickel-iron alloy and iron.
Posted by Md Shoaib 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
Magnetisation can be defined as a process in which a substance is made a permanent or temporary magnet by exposing them to an external magnetic field.
The magnetic field intensity at any point is defined as the force experienced by the point when placed under the influence of an external magnetic field.
Posted by Md Shoaib 6 years, 1 month ago
- 1 answers
Yogita Ingle 6 years, 1 month ago
Two characteristics of materials used for making permanent magnets:
(a)high retentivity so that the magnet is strong and
(b) high coercivity so that the magnetisation is not erased by stray magnetic fields, temperature fluctuations or minor mechanical damage.
Posted by Md Shoaib 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
The oscillator frequency should be same as proton’s cyclotron frequency.
we have B = 2πmv /q = 6.3 ×1.67 × 10–27 × 107 / (1.6 × 10–19) = 0.66 T
Final velocity of protons is
v = r × 2πv = 0.6 m × 6.3 ×107 = 3.78 × 107 m/s.
E = ½ mv2 = 1.67 ×10–27 × 14.3 × 1014 / (2 × 1.6 × 10–13) = 7 MeV.
Posted by Md Shoaib 6 years, 1 month ago
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Posted by Aaditya Tyagi 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
1 eV is the energy gained by an electron when it is accelerated through a potential difference of 1 volt. i.e.
1 eV = 1.6 × 10-19 J
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