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A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The total flux for the surface of the cylinder is given by

Posted by Anchal Shukla 12 hours ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What polytechnic does

Posted by Vishvesh Vishvesh 16 hours ago

CBSE > Class 12 > Physics

0 answers

ANSWER

If an electron ,moving with a finite velocity, enters a transverse electric field, then which path will the electron be take ?

Posted by Kartika Verma 19 hours ago

CBSE > Class 12 > Physics

0 answers

ANSWER

You are asked to measure e.m.f of a cell.Which instrument will you use? A high resistance Voltmeter or Potentiometer and why?

Posted by Suraj Mishra 1 day, 10 hours ago

CBSE > Class 12 > Physics

1 answers

Suraj Mishra 1 day, 10 hours ago

The Voltmeter basically measures the Potential Difference between two electrodes. ... That's why it is not used to measure the e.m.f. of the cell. Now, Potentiometer measures the e.m.f. of the cell, which is nothing but the open circuit voltage of the cell.

ANSWER

Do anyone here require a month crash course for complete syllabus of physics and maths in minimum fees of 1500?

Posted by Shikha Singh 1 day, 10 hours ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Which of the following unit cell has all the angles at 90? but the sides are of unequal length?

Posted by Prakhar Raghuvanshi 1 day, 10 hours ago

CBSE > Class 12 > Physics

1 answers

Anurag Saral an hour ago

orthorhombic

ANSWER

If a charged body is to retain charge for a long time, it should not have point ends. Why?

Posted by Jashan G 1 day, 17 hours ago

CBSE > Class 12 > Physics

1 answers

Shikha Singh 1 day, 10 hours ago

If you ever have noticed in winters ,our nose , fingers tips are cooler than rest of our body(even being at the same condition) Pointed things relalease out energy or we can say looses energy at higher rate than curved ones

ANSWER

Use the lens equation to show that an object placed between f and 2f of a convex lens produces a real image beyond 2f

Posted by Adhya Singh 2 days, 20 hours ago

CBSE > Class 12 > Physics

2 answers

𝖘𝖍𝖗𝖆𝖉𝖉𝖍𝖆 ✨✰✰ 2 days, 17 hours ago

Since image distance is negative, image is formed at the same side of mirror as the object at a distance greater than 2f. Magnification is given by: m=−vu<0. Hence, theimage formed is real.

Adi Magotra 2 days, 17 hours ago

Hello

ANSWER

A uniform electric field of strength 2*10^3N/C is established between two parallel plates of length 0.1 m held horizontally at a distance 0.02m apart an electron is projected at a speed of 6*10⁶ m/s making an angle 45°, the field is directed vertically upward.will the electron strike the either plate?If it strikes the plate , where does it do so?

Posted by Hafsa Khatoon 3 days, 1 hour ago

CBSE > Class 12 > Physics

1 answers

Shikha Singh 1 day, 10 hours ago

It will follow parabolic path so consider it as an parabola question and find the range

ANSWER

Why p type and n type are electrically neutral through holes not through electrons??¿

Posted by Prachi Prachi 4 days, 15 hours ago

CBSE > Class 12 > Physics

2 answers

Anurag Saral 4 days, 13 hours ago

What Google says: p and n type materials are NOT positively and negatively charged. An n-type material by itself has mainly negative charge carriers (electrons) which are able to move freely, but it is still neutral because the fixed donor atoms, having donated electrons, are positive. Similarly p-type material by itself has mainly positive charge carrier (holes) which are able to move relatively freely, but it is still neutral because the fixed acceptor atoms, having accepted electrons, are negative.

Anurag Saral 4 days, 13 hours ago

My Answer: p and n type semiconductor are not actually +vely and -vely charged... as in n type electrons move towards p type due to which the donor atom acquires + and in p type acceptor holes acquire - which makes it neutral.

ANSWER

Explain "In parallel combination the bulb with highest wattage will glow brighter with maximum brightness and will fused first "

Posted by Kajal Kansal 4 days, 20 hours ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Sometimes we take charge of electron positive and sometime we take it negative in which case we take it positive and in which case we take it negative?????

Posted by Deepty Kundu 5 days, 14 hours ago

CBSE > Class 12 > Physics

1 answers

Shikha Singh 1 day, 10 hours ago

If are talking about charge of electron then it is always negative.....in some situations the polarity of charge does not matter whether the charge is negative or positive Like while calculating electric force and electric field intensity we only consider the magnitudes of the charges

ANSWER

Why should we have narrow sources to produce good interference fringes???

Posted by Kirti Sharma📚 5 days, 15 hours ago

CBSE > Class 12 > Physics

2 answers

𝖘𝖍𝖗𝖆𝖉𝖉𝖍𝖆 ✨✰✰ 2 days, 17 hours ago

: It is because a broad source is equivalent to a large number of narrow sources lying close to each other. Different pairs of narrow sources willproduce their own interferencepatterns which will overlap each other

Nik . 5 days, 15 hours ago

Hi

ANSWER

A rectangular loop and a circular loop are moving out of a uniform magnetic field region with a constant velocity V as shown in the figure in which loop do you expect the induced EMF is constant during the passage out of the field region the field is normal to the loops

Posted by Professor Matemáticas 5 days, 21 hours ago

CBSE > Class 12 > Physics

1 answers

Professor Matemáticas 5 days, 21 hours ago

In this question Rate of change of area of Circular loop is not constant But Rate of change of area of rectangular loop is constant Please Explain Why Rate of change of area of Circular loop is not constant and why rate of change of area of rectangular loop is constant

ANSWER

No work is done in moving a test charge over an equipotential surface. Why

Posted by Parneet Dhillon 6 days, 13 hours ago

CBSE > Class 12 > Physics

3 answers

Saloni Kaushik 3 days, 23 hours ago

W=delV ×q and delV=0 as V in an equipotential surface is same

Nidhi Bharti 6 days, 9 hours ago

This is because potential over the equipotential surface is same everywhere and work done is given by the formula: ( Work done = q∆V) and as ∆V is 0 so work done will also be zero

Manvi Gupta 6 days, 12 hours ago

Because potential is same at every point on equipotential surface. W/q=Vb-Va Vb=Va So,W/q=0 W=0

ANSWER

3.Find The Force Of Attraction Between An Electron & a proton separated by a distance of 1.6 mm?

Posted by Lilly Vaidya 6 days, 13 hours ago

CBSE > Class 12 > Physics

4 answers

Saloni Kaushik 3 days, 23 hours ago

9×10^-23 N

Nik . 5 days, 15 hours ago

Force ka value puch rhi hai type nhi

Anuradha Patwari 5 days, 18 hours ago

Which is of four types

Anuradha Patwari 6 days, 13 hours ago

Neclear force

ANSWER

A lift starts from the top of a mine shaft and descends with a constant speed of 10 m/s. 4 s later a boy throws a stone vertically upwards from the top of the shaft with a speed of 30 m/s. If stone hits the lift at a distance x below the shaft write the value of Š / (in m) [Take: g = 10 m/s?] (Give value of 20/6 = 49)

Posted by Manikya Kishore Varshney 1 week ago

CBSE > Class 12 > Physics

1 answers

Sia 🤖 1 week ago

Please ask question with complete information.

ANSWER

Which subject is hard, according to you in 12th

Posted by Khilendra Sahu 6 days, 18 hours ago

CBSE > Class 12 > Physics

5 answers

Pratiksha Singh 1 week ago

Nothing is hard, it just depends upon your understanding and intrest.

Akashi Khandelwal 1 week ago

Physics

Gungun Yadav 1 week ago

chemistry organic

Yashika Chhikara 1 week, 1 day ago

Chemistry

Khilendra Sahu 1 week, 1 day ago

My choice is physics and your

ANSWER

Important topics from ch- Semiconductors???

Posted by Nimesh Jangid 1 week, 2 days ago

CBSE > Class 12 > Physics

2 answers

Anuradha Patwari 1 week, 1 day ago

Pn junction diode

Nik . 1 week, 1 day ago

.

ANSWER

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Posted by Nik . 1 week ago

CBSE > Class 12 > Physics

0 answers

ANSWER

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Shahu Sardar 1 week, 2 days ago

CBSE > Class 12 > Physics

0 answers

ANSWER

a parallel plate capacitor is charged by a battery after sometime the battery is connected and a dielectric slab with its thickness equal to the plates separated is inserted between the plates what change in any will take place in charge on the plates electric field intensity capacitance of the capacitor potential difference and energy stored in the capacitor

Posted by Muskan Purohit 1 week, 3 days ago

CBSE > Class 12 > Physics

1 answers

Vishal M 1 week, 3 days ago

B

ANSWER

An electron is placed at the center of a charge ring with charge q of radius r .if electron is made displace slightly on axis of ring then what will be the angular frequency of electron

Posted by Himanshi Rajput 1 week, 3 days ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is derivation of capacitance of a cylindrical capacitor is included in the syllabus of class 12th cbse for 2021-22 ?

Posted by Shrestha Pal 1 week, 3 days ago

CBSE > Class 12 > Physics

3 answers

Yash Phougat 1 week, 2 days ago

Yesss

Arman Gupta 1 week, 3 days ago

I think it not included

Nik . 1 week, 3 days ago

Yes

ANSWER

What are the factors affecting refractive index

Posted by Nik . 1 week, 4 days ago

CBSE > Class 12 > Physics

2 answers

Nik . 1 week ago

.

Shivam Pal 1 week, 3 days ago

Temperature , wavelength of light

ANSWER

An electric dipole consists of charges +-2×10^8C seperated by a long distance of 2mm.it is placed near a long line charge of density 4×10^-4cm^-1 as shown in the figure such that the negative is at a distance of 2cm from the line charge.calculate the force acting on the dipole.

Posted by Ankita Chatterjee 1 week, 4 days ago

CBSE > Class 12 > Physics

0 answers

ANSWER

How can I remember the formulas of physics

Posted by Khilendra Sahu 1 week, 4 days ago

CBSE > Class 12 > Physics

4 answers

Khilendra Sahu 1 week, 1 day ago

Thanks to all

Rahul Kumar Keshri 1 week, 2 days ago

Theory padhne se sath sath formula ko bhi yaad karte jao aur samajh kr yaad karo...

Ashutosh Tiwari 1 week, 3 days ago

Make a formula Dairy of those subjects that are hard for you and revise them constistency

Nik . 1 week, 4 days ago

Make a special note of formula only and provide 10-15 minute daily on learning it

ANSWER

Define quantisation of charge and relative permittivity with formula

Posted by Renu Taneja 1 week, 4 days ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the cause of electromagnetic waves?

Posted by Pk .. 1 week, 5 days ago

CBSE > Class 12 > Physics

3 answers

Rahul Kumar Keshri 1 week, 2 days ago

Due to accelerating charge particle..

Anuradha Patwari 1 week, 4 days ago

Correct answer

Nidhi Bharti 1 week, 5 days ago

Oscillating electric field And magnetic field perpendicular to each other, leads to the electromagnetic wave formation.

ANSWER

Two charges of equal magnitudes kept at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, what is the new force acting on each charge

Posted by Rachita T 1 week, 5 days ago

CBSE > Class 12 > Physics

5 answers

Nidhi Bharti 1 week, 3 days ago

F/16

Nikita Chauhan 1 week, 4 days ago

Force remains same

Srijan Saxena 1 week, 4 days ago

Force will remain same

Anuradha Patwari 1 week, 5 days ago

4 time

Anurag Saral 1 week, 5 days ago

Force when magnitude of charge is same F=q^2/4(pi)(Eo)r^2 if charges are halved and distance is doubled then F=q^2/64(pi)(Eo)r^2

ANSWER

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