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Ask QuestionPosted by Simran Raj 5 years ago
- 2 answers
Yogita Ingle 5 years ago
Given,
109 electron takes 1sec
So, 1 electron takes → 1/109 sec
And we know, 1C=6.242×1018electron
∴6.242×1018electrons takes →6.242×1018/109
=6.242×109 sec
= 6.242×109/ 60×60×24×365 years
=197.93years
≃198years
If 109 electrons move out of a body to another body every second, then 198years is required to get a total charge of 1C on the other body.
Posted by Ashutosh Yadav 5 years ago
- 1 answers
Gaurav Seth 5 years ago
Answer:
Because current that flows through the wire is depended on the wire cross section area, the circular shape is the maximized area for a given amount of material; therefore, a cylindrical wire is much more efficient.
Posted by Anshul Raghuvanshi 5 years ago
- 3 answers
Yogita Ingle 5 years ago
(a) The shape of the wavefront in case of a light diverging from a point source is spherical. The wavefront emanating from a point source is shown in the given figure.
(b) The shape of the wavefront in case of a light emerging out of a convex lens when a point source is placed at its focus is a parallel grid. This is shown in the given figure.
(c) The portion of the wavefront of light from a distant star intercepted by the Earth is a plane.
Gaurav Seth 5 years ago
Plane Wavefront
- When the small part of a spherical or cylindrical wavefront originates from a distant source like infinity then the wavefront which is obtained is known as plane wavefront.
- For example: -Rays coming from infinity like Sun.
Posted by Binayak Dutta 5 years ago
- 1 answers
Posted by Kuldeep Das 5 years ago
- 2 answers
Gaurav Seth 5 years ago
In young's double slit experiment,
Angular separation is given by,
Angular seperation does not depend on D i.e., the distance of separation between slits and screen. Therefore, remains unaffected.
Gaurav Seth 5 years ago
In young's double slit experiment,
Angular separation is given by,
Angular seperation does not depend on D i.e., the distance of separation between slits and screen. Therefore, remains unaffected.
Posted by Anubhav Singh 5 years ago
- 1 answers
Posted by Chhatrapal Sahu 5 years ago
- 2 answers
Posted by Anukriti Jain 5 years ago
- 1 answers
Posted by Anusuya Kulothungan 5 years ago
- 3 answers
Gaurav Seth 5 years ago
A N S W E R
We can not see clearly through fog because the light is scattered by the droplets in the fog. The light is scattered by very small particles, this phenomenon is called Tyndall effect.
Posted by Gungun Gupta?? 5 years ago
- 4 answers
Sneha Panwar 5 years ago
Posted by Gungun Gupta?? 5 years ago
- 2 answers
Posted by Gungun Gupta?? 5 years ago
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Harsh Mishra 5 years ago
Posted by Krishna Prajapati 5 years ago
- 1 answers
Yogita Ingle 5 years ago
The molar conductivity of a solution at infinite dilution is known as limiting molar conductivity. In other words, When the concentration of the electrolyte approaches zero, the molar conductivity is known as limiting molar conductivity.
Posted by Deepak . 5 years ago
- 1 answers
Yogita Ingle 5 years ago
nλ/ d = 2λ/ a
n = 2d/a ,where d is separation between slit and a width of slit.
Posted by Anjali Sharma 5 years ago
- 3 answers
Mukul Daksh 5 years ago
Posted by Aditya Singh Thakur 5 years ago
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Posted by Rohan Chaudhary ??? 5 years ago
- 2 answers
Gungun Gupta?? 5 years ago
Posted by Rohan Chaudhary ??? 5 years ago
- 0 answers
Posted by K S 5 years ago
- 1 answers
Abhinay Verma 5 years ago
Posted by Rahul Yadav 5 years ago
- 1 answers
Gaurav Seth 5 years ago
CBSE Class 12 Sample Paper 2021 (PDF) & CBSE Class 12 Marking Scheme 2021 has been released online on the official website. Important for CBSE 12th board exam 2021 & based on revised CBSE Syllabus 2020-21, these CBSE Class 12 Sample Papers are one of the best resources for the exam preparatiON.
Click the blue link:
Question paper:<a href="http://cbseacademic.nic.in/web_material/SQP/ClassXII_2020_21/Physics-SQP.pdf" target="_blank">SQP</a>
Answers: <a href="http://cbseacademic.nic.in/web_material/SQP/ClassXII_2020_21/Physics-MS.pdf" target="_blank">MS</a>
Posted by Kt Vasoh Kho 5 years ago
- 2 answers
Gaurav Seth 5 years ago
Object at Centre of Curvature (C):
When the object is placed at centre of curvature (C) of a concave mirror, a real and inverted image is formed at the same position.
Fig: Object at C
Properties of image:
- Same size as object
- Real and inverted
Posted by Sanjeet Balhara 5 years ago
- 2 answers
Posted by Gungun Gupta?? 5 years ago
- 3 answers
Devil ? 5 years ago
Posted by Jyoti Yadav 5 years ago
- 1 answers
Yogita Ingle 5 years ago
Nuclear Reactor
- Nuclear reactors are useful in producing electricity.
- A nuclear reactor is an arrangement to generate electricity whichmakes use of nuclear fission.
Requirements for controlled nuclear fission in reactor:
- Neutrons to be slowed down.
- Neutrons are slowed down by using moderators which are lighter nuclei which slow down fast moving neutrons by elastic collision.
- Commonly used moderators:-
1.Water
- Heavy Water
- Graphite
- Consequence of use of moderators:-
- Multiplication factor of neutrons increases: - When a neutron hits a target nucleus along with daughter nucleus,it produces 3 neutrons.These 3 neutrons are highly energetic but they need to be slowed down, so they can hit the target nucleus.
- As a result high multiplication factor results in uncontrolled chain reaction.
Posted by Sanjana Chhetrii 5 years ago
- 2 answers
Kabir Saroha 5 years ago
Yogita Ingle 5 years ago
An electrostatic field line is a continuous curve because a charge experiences a continuous force when traced in an electrostatic field. The field line cannot have sudden breaks because the charge moves continuously and does not jump from one point to the other.
Posted by Vineet Pal 5 years ago
- 3 answers
Rimjhim Gupta 5 years ago
Yogita Ingle 5 years ago
Solenoid is a long coil containing large number of close turns of insulated copper wire.
Given below is the diagram of solenoid:
Posted by Arjita Sahu 5 years ago
- 2 answers
Yogita Ingle 5 years ago
The magnetic field inside a solenoid, B∝n,where, n is the number of turns in coil per unit length of the solenoid.
Hence, when the number of turns in coil increases, n increases, and resultantly B increases.
Devil ? 5 years ago
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Rohan Chaudhary ??? 5 years ago
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