The electric intensity E, current density and conductivity a are … - Vidyadip

MCQ

The electric intensity $E$, current density and conductivity a are related as

✓
$j =\sigma E$
B
$j =\frac{E}{\sigma}$
C
$J E=s$
D
$j=\sigma^2 E$

✓

Answer

Correct option: A.

$j =\sigma E$

$j =\sigma E$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer." from Current Electricity→Current Electricity — all question types→Physics STD 12 question papers→Tamilnadu Board STD 12 question papers→Tamilnadu Board question paper generator→

Similar questions

A coil of area $10 cm ^2, 10 ms ^{-1}$ turns and resistance $20 \Omega$ is placed in a magnetic field directed perpendicular to the plane of the coil and changing at the rate of $10^8$ gauss/second. The induced current in the coil will be-

When current I flows through a wire, the drift velocity of the electrons is v. When current 21 flows through another wire of the same material having double the length and area of cross-section, the drift velocity of the electrons will be-

Ohm’s Law is not obeyed by

The resolving power of the electron microscope is times greater than the resolving power of the optical microscope

Which of the following radiations has the longest wavelength?

A coil of crosssectional area $400 cm ^2$ having 30 turns is making 1800 $rev / min$ in a magnetic field of IT. The peak value of the induced emf is-

The focal length of a normal eye-lens is about

A wire of resistance R is stretched to three times its original length. The new resistance is

Yellow light is refracted through a prism producing minimum deviation. If i1 and i2 denote the angle of incidence and emergence for this prism, then

When ordinary light is made incident on a quarter-wave plate, the emergent light is