CBSE > Class 12 > Physics | CBSE Board | Homework Help

▪Rectifier is a device used to convert ac into dc by the process of rectification ▪PRINCIPLE -a diode is used as a rectifier because when it is forward biased during positive half cycle,current flows but during negative half cycle the resistance increase nd current flow is negligible. This unidirectional property of diode enable it to be used as a rectifier ▪There are two types of rectifier 1 half wave rectifier 2 full wave rectifier ▪ In half wave rectifier.,we get a have rectified wave that is only during positive half cycle when current flows through it .In this only one diode is present which when forward bias allow current to flow nd when reverse biased do not allow current to dlow through it . ▪In full wave rectifier we get a fullly rectified wave .It contains two diodes D1 and D2 .when D1 is forward biased D2 is reverse biased .hence the current flow is due to diose D1 .in next cycle D2 is forward biased nd D1 is reverse biased .hence current flows due to diode D2 .so we get a full rectified wave ....... ▪the device used for full wave rectification is called full wave rectifier ▪the device used for half wave rectification is called half wave rectifier. U can search on google for its constructions nd graphs...they are important. ....

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What is amplifier with all of its details?

Posted by Deepak Jindal 6 years, 11 months ago

CBSE > Class 12 > Physics

4 answers

Deepak Jindal 6 years, 11 months ago

Thanks

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Aarav Raj 6 years, 11 months ago

Bez of amplify sound

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Aarav Raj 6 years, 11 months ago

On which basis loudspeaker work .

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Sanjay Singh 6 years, 11 months ago

It is used to produce enlarge copy of meassage signal

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An electric dipole of length 20 cm having charge ±3*10^-3, placed at an angle 30º with respect to a uniform electric field, experienced at torque of magnitude 6√3nm. Calculate a)Magnitude of electric field b)Potential energy of dipole

Posted by Aleena Mariyam George 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Any app by which i can understand my physics syllabus

Posted by Abhi Kandil 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Amandeep Kumar 6 years, 11 months ago

Mycbseguide

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Distinguish between metals insulator and semiconductor on the basis of band theory of solid

Posted by Suresh Netam 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Vishali Raina 6 years, 11 months ago

On the basis of band theory: In metals valence band and conduction band overlaps each other . In insulators gap between valence band and conduction band is more than 3eV. And in semiconductor gap is less than 3eV.

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How will the interference pattern of young's double slit experiment change if one of the two slit is covered by a paper which transmits only half of light intensity.

Posted by Tanu Yadav 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Derive an expression for the electric potential at a point in the end on position af an electric dipole

Posted by Aamir Suhail 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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How to score 70/70

Posted by Shreyash Rajoria 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Navya Singh 6 years, 11 months ago

Just refer to last 10 years nd arihant. ..

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Tejasv G 6 years, 11 months ago

Never believe no teachers don't read any book always sleeping

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Is there anyone who help me to find the last three years physics exam paper? Plzz anyone send me the true link? I searched so many but every paper is different

Posted by Deeksha Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Navya Singh 6 years, 11 months ago

?right @ash thunderbird✔

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Ash Thunderbird ✔ 6 years, 11 months ago

You can find previous 15 year papers on this app ? Why do you guys even use this app for?

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Electric field at a distance point on the equitarial line of an electric dipole.

Posted by Prj Raj 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

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Define drift velocity and derive an expression

Posted by Gokul Thakur 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Harisha Goothy 6 years, 11 months ago

Bruh ...its there in NCERT....how can someone derive it out here...

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Write meter Bridge principle, construction, theory and its uses

Posted by Gokul Thakur 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Saloni Singh 6 years, 11 months ago

it is based on principle of Wheatstone bridge . In this bridge one lateral pair of resistance is replaced by a straight wire of length 1m of uniform crossection. And other pair consist of one known and one unknown resistance. USES - it is used to find the unknown resistance of a conductor as that of Wheatstone bridge

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two lamps one rated 100W and the other 200W at 220V connected in series and supply of 220V.

Posted by Vinckal Jindal 6 years, 11 months ago

CBSE > Class 12 > Physics

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What is sant

Posted by Ranjan Tiwari 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Shama Shama Sheikh 6 years, 11 months ago

Shunt mean a minimum amount of resistance to follow the galvanometer

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Deeksha Singh 6 years, 11 months ago

Its shunt* the resistance which is connected in parallel

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Define intensity of radiation on the basis of photon picture of light. Write its SI unit

Posted by Anshika Babbar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

The amount of light energy / photon energy, incident per metre square per second is called intensity of radiation.

SI Unit : W/m² or Joule/Sec-meter²

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What is a dipole moment

Posted by Monu Yadav 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Sumit Mahato 6 years, 11 months ago

Product of either charges separated by a Small distance 2a is known as dm

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Yogita Ingle 6 years, 11 months ago

A dipole moment is the product of the magnitude of the charge and the distance between the centers of positive and negative charges. It is denoted by the Greek letter ‘µ’.
Mathematically,
Dipole Moment (µ) = Charge (Q) × distance of separation (r)
It is measured in Debye units denoted by ‘D’.
1 D = 3.33564 × 10^-30 Cm
Where C is Coulomb and m is in meters.

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What's is magnetic fields?

Posted by Vishal Chitrode Chitrode 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Ash Thunderbird ✔ 6 years, 11 months ago

The space around a magnet or a current carrying conductor in which its magnetic influence can be experienced is called magnetic field. S.I unit - Tesla (T)

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Force on a moving charge in a uniform magnetic field

Posted by Sonu Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Ash Thunderbird ✔ 6 years, 11 months ago

F = q(VxB)

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What is dip of angle

Posted by Gaurav Varshney 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Navya Singh 6 years, 11 months ago

How you added pic here ?@yogita ingle

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Yogita Ingle 6 years, 11 months ago

The angle made between the total of earth’s magnetic field (B_e) with the surface of the earth (horizontal component) in the magnetic meridian is known as angle of dip.

The yellow lines indicate the surface of the earth. The blue lines indicate the total magnetic field of earth which is actually tangent to the magnetic field line. This angle of dip is 90 degrees at the equator and 0 degrees at the poles.

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Define the term temperature coefficient of receptivity. Show graphically the variation of receptivity with temperature for nichrome

Posted by Abrar Ahmad 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

Temperature coefficient Magnetism of resistance is numerically equal to the change in resistance of a wire of resistance 1 Ω at <nobr aria-hidden="true"></nobr> 0°c when the temperature changes by <nobr aria-hidden="true">1°C</nobr>.
This property of metals is used in making resistance thermometers.

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Define a wavefront using huygens principle and verify the laws of reflection at a plane surface

Posted by Prashant Yadav 6 years, 11 months ago

CBSE > Class 12 > Physics