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!
Explain temperature dependence of electrical conductivity and resistivity in conductors.
When the temperature is increased, there is a greater thermal motion in atoms that reduces the regularity in the atoms spacing along with a consequent reduces in the mobility of the electrons. Therefore the resistivity of most of the conductors increases along with an increase in the temperature. Because the number and the energy of the electrons at top of the Fermi distribution curve vary insignificantly along with temperature, change in temperature should be related with a change in the mean free path. Within a perfectly regular lattice, all electrons will exist in a particular energy state and they will have a fixed velocity. Basically in practical way metals do not have a perfect lattice due to impurities and deviations of the atoms about their mean positions because of lattice oscillations. Because the lattice oscillations decreases at low temperature the scattering of electron waves falls and therefore the conductivity increases quickly as the temperature reaches absolute zero. There is a limiting value beyond that the conductivity will not increase. Generally, purer the specimen higher is the conductivity. The conductivity of several conductors decreases linearly as the temperature is raised above the room temperature but below that temperature the conductivity raises markedly.
Q. What do you mean by Sign Bit? The sign bit is like simple as it gets 0 denotes a positive number and 1 denote a negative number and flipping the value of this bit flips the
Explain Dielectric constant. Dielectric constant: This is also termed as 'Permittivity'. All insulating material possesses an electrical capacitance. Such capacitance of unit d
I am assigned to make above mentioned thing...Know the theory but need an authentic circuit diagram(simple).It must contain a solenoid and other simple objects
Shunt clippers are preferred over series clipper??
Q. Explain why equalizing connection are used in lap winding and dummy coils are some time used in wave winding. Sol. For batteies operating in parallel, the circulating c
What is the Direction of a line of flux The direction of a line of flux is from the north pole to the south pole on the exterior of the magnet and is then supposed to continue
Speed Control of DC Shunt Motor V dc the output of rectifying circuit which is applied to the motor field as shown in figure for armature voltage V dc is controlled by
Q. An antenna has beam widths of 3° and 10° in orthogonal planes and has a radiation ef?ciency factor of 0.6. Find the maximum radiation inten- sity if 1 kW is applied to the anten
A squirrel-cage inductionmotor operates at a slip of 0.05 at full load. The rotor current at starting is five times the rotor current at full load. Neglecting stator resistance and
Q. Describe the following phasor equations represented in the time domain: (a) ¯ E = K1e-¯ γz (b) ¯ E = K2e ¯ γz where z is the space coordinate, K1 and K2 are constants,
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd