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∴ |(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)

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The emf value of an ac isE=314sin 314t write down the value of its frequency.

Posted by Jaswant Khandey 6 years ago

CBSE > Class 12 > Physics

1 answers

Yuvraj Singh 6 years ago

Frequency = 50 Hz

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ANSWER

Which diode is used as voltage stabilizer?

Posted by Ns H 6 years ago

CBSE > Class 12 > Physics

2 answers

Pankaj Ku 6 years ago

Zener diode

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Yogita Ingle 6 years 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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If the power loss in a circuit is zeo the current is called.

Posted by Dk Boss 6 years ago

CBSE > Class 12 > Physics

2 answers

Josna Mary Thomas Thomas 6 years ago

Watless current or useless current

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Ashrai Tmg 6 years ago

Watless current

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A uniform wire of resistance R is shaped into regular n sided polygon ,where n is even. Find the equivalent resistance between (a) -opposite corners of polygon (b) -adjacent corners of polygon

Posted by Nikhil Jain 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The direction of an induced emf is always such it tend to set up a current opposing the motion or the change of flux responsible for inducing that emf this is statement for

Posted by Dk Boss 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

The direction of an induced EMF is always such that it tend to set up a current opposing the motion or the charge of flux responsible

Posted by Dk Boss 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Give Two application of cyclotron

Posted by Pallavi Singh 6 years ago

CBSE > Class 12 > Physics

1 answers

Aaditya Bhardwaj 6 years ago

1.Cyclotron beams can be used to bombard other atoms to produce short-lived positron-emitting isotopes suitable for PET imaging. 2.Cyclotrons can be used in particle therapy to treat cancer.

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Please tell me the supermost imp ques or topics which have the high chances to come? plzz???

Posted by Mahika Joshi 6 years ago

CBSE > Class 12 > Physics

1 answers

Chetna Bhatt 6 years ago

Moving coil galvanometer Cyclotron Gauss theorem Kirchoffs law Telescope Microscope Drift velocity

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ANSWER

Waves having equal intensity undergo in interference please derive

Posted by Aryan Mishra 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive biot savarts law?

Posted by Dipasha Kumari 6 years ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years 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 = (μ_o/4π)×idl×(sinθ)/r²

dB = idl × r / r³

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Suggest an idea to convert a full wave rectifier to a half wave rectifier by changing the connected wires.

Posted by Josna Mary Thomas Thomas 6 years ago

CBSE > Class 12 > Physics

1 answers

My Udaipur 6 years ago

Remove one diode

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ANSWER

IMPORTANT DERIVATIONS FOR BOARD EXAMS......HELP ME PLEASE......MY PHYSICS PRE BOARD IS ON MONDAY....

Posted by Chetna Bhatt 6 years ago

CBSE > Class 12 > Physics

10 answers

Parul Singh 6 years ago

And other imp main topics of other chapter

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Parul Singh 6 years ago

And potentiometer, amperes circutal law, angle of dip, classification of the magnetic material, hysteresis curve, faraday law, lenzs law, AC & DC, root mean square derivation

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Chetna Bhatt 6 years ago

THANK YOU SO MUCH GUYS ??

2Thank You

Chetna Bhatt 6 years ago

Parul...and what???

1Thank You

Parul Singh 6 years ago

And

1Thank You

Parul Singh 6 years ago

Goss theorem & its applications, capacitance of a parallel plate capacitor, kirchhofs law