Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
RESISTIVITY:
Resistance may be defined as that property of a substance which opposes (or restricts) the flow of current (or electrons) through it. The practical as well as MKS (or SI) unit of ohm (O). 1 ohm is defined as that resistance between two points of a conductor which produces a current of one ampere. When a potential difference of 1 volt is applied to it.
If I is the current flowing through a conductor of resistance R across which a potential difference V is applied then according to ohm's law.
I=V/R
Where V is in volts, R is in the ohms and I is in amperes.
Resistance of a material is:
(a) Directly proportional to its length, l R α l
(b) Inversely proportional to its area of cross section a, Rα1/a
Combining above two facts me have R α l/a
Or R=ρl/A
Where ρ(rho) is a constant depending upon the nature of the material and is known as the specific resistance or resistivity of the material. Putting l=1 and a=1 expression we have R=ρ. Hence resistance of a material of unit length having unit cross-sectional area is defined as the resistivity.
What is the Directionality of LASER? Directionality: Laser emits light which is highly directional. Laser light is emitted like a relatively narrow beam in an exact direction.
Example 1 - A bird feeder in your yard has a total mass of 3.0 kilograms and is supported as shown. What is the force on the top wire? The bird feeder is not falling so the forc
Which is correct statement about proton: (1)Proton is nucleus of deuterium (2)Proton is ionized hydrogen molecule (3)Proton is ionized hydrogen atom (4)Proton is alfa
The waves which do not needs medium for their propagation are known as non- mechanical or electromagnetic waves. Examples : Light, heat (Infrared), radio waves, gamma- rays, X-r
If conductors carries current in similar direction, then force among them will be attractive. If conductor carries current in reverse direction, then force among them will be repul
Conservation of Energy Conservation of energy is not all about turning off the computer when you are not using it. Energy is not created or destroyed, it just changes forms. En
Explain Constant current system Constant current system : - In this process, the charging current is kept constant by varying the supply voltage to overcome the enhanced back
Explain the procedure of finding Miller indices. Procedure of finding Miller indices: a. The intercepts of the needed plane onto the three coordinate axes has to be founded.
Could the light along a side emitting optic be a totally homogeneous? Regardless of the assurances of several manufacturers, it is a total impossibility since it would clash wi
what is viscosity?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd