Tag: physics
Questions Related to physics
When there is an electric current through a conducting wire along its length then an electric field must exist
Copper contains $8.4\times 10^{28}$ free electrons$/m^3$. A copper wire of cross-sectional area $7.4\times 10^{-7}m^2$ carries a current of $1$A. The electron drift speed is approximately.
Drift velocity varies with the intensity of electric field as per the relation
a current 10 ampere is maintained in a conductor of cross section of $ 10^{-4}m^2 $. if the electron density is $ 9 \times 10^{28} m^{-3} $ , what is the drift velocity of free electrons?
The relaxation time $(t)$ is the:
The drift velocity of free electrons in a conductor is $v$, when a current. $I$ is flowing in it if both the radius and current are doubled, then drift velocity will be.
Who invented the cyclotron?
Which year was declared as International Year of Physics. ?
In which year did Hahn and Meitner discover the phenomenon of neutron-induced fission of uranium. ?
Lightning was discovered by the