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Yogita Ingle 6 years, 2 months ago
By conservation of momentum
m1v1 = – m2v2
∴ |(v1 / v2)| = |(m2 / m1)|
Given : (v1 / v2) = (8 / 1) hence |(m2 / m1)| = (8 / 1) .......(1)
Also mass = density × volume
∴ (m1 / m2) = [{(4 / 3)πr13 × ρ} / {(4 / 3)πr23 × ρ}] = (r1 / r2)3 .....(2)
∴ from (1) & (2)
(r2 / r1)3 = (8 / 1)
(r2 / r1) = (2 / 1)
(r1 / r2) = (1 / 2)
Posted by Jaswant Khandey 6 years, 2 months ago
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Yogita Ingle 6 years, 2 months ago
We know that the rectifier converts AC current into DC current. When the AC input voltage of a rectifier fluctuates, the rectified output also fluctuates. Hence, to get a constant DC voltage from the DC unregulated output of the rectifier, we use Zener diode.
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Yogita Ingle 6 years, 2 months ago
- We already know now that current carrying conductor generates magnetic field around themselves. Biot-Savart law just mathematically states the intensity of this magnetic field at a point.
- According to the Biot-Savart law, magnetic field dBdue to current element idl, at a pointP situated at distancer from the current element idl,is:
i) directly proportional to the current element idl, ii) directly proportional to the sine of the angle (θ) between current element and r, and iii) inversely proportional to the square of the distance r between current element and the point
dB∝idl (sinθ)/r2
dB = (μo/4π)×idl×(sinθ)/r2
dB = idl × r / r3
Posted by Chetna Bhatt 6 years, 2 months ago
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