Download App

Current Electricity — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
Question
Define the term 'electrical conductivity' of a metallic wire. Write its S.I unit.
✓

Answer

Electrical conductivity is defined as current density per unit electric field. (Alternatively, Reciprocal of resistivity)
SI Unit : $\mathrm{ohm}^{-1} \mathrm{~m}^{-1}$

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 "1 Marks Question" from Current Electricity→Current Electricity — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

How does the mutual inductance of a pair of coils change when
  1. Distance between the coils is increased and
  2. Number of turns in the coils is increased?
→
An a.c. source of voltage $\text{V} = \text{V}_{o} \sin \omega \text{t}$ is connected to an ideal inductor. Draw graphs of voltage V and current i versus $\omega\text{t}.$
→
Answer the following question:
When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why?
→
NaCl molecule is bound due to the electric force between the sodium and the chlorine ions when one electron. of sodium is transferred to chlorine. Taking the separation between the ions to be 2.75 × 10cm, find the force of attraction between them· State the assumptions (if any) that you have made.
→
Show variation of resistivity of Si with temperature in a graph.
→
Frictional force between solids operates even when they do not move with respect to each other. Do we have viscous force acting between two layers even if there is no relative motion?
→
Write the formula of Coulomb's law in vacuum or air.
→
Choose the correct alternative:
The resistivity of the alloy manganin is nearly independent of/ increases rapidly with increase of temperature.
→
The magnifying power of a simple microscope will be maximum for which colour of light and minimum for which colour of light?
→
Name the dielectric whose molecules have:
  1. Non-zero,
  2. Zero dipole moment.
→