Download App

Current Electricity — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity2 Marks
Question
In a cylindrical conductor, a direct current is flowing. Is there any electric field inside the conductor?
✓

Answer

Current flows in the conductor only when electric field established inside the conductor applies force on every free electron. Hence there is electric field inside the conductor.

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 "Short Answer Type Questions [2M]" from Current Electricity→Current Electricity — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Lithium (Z = 3) has two stable isotopes 6Li and 7Li. When neutrons are bombarded on lithium sample, electrons and $\alpha$-particles are ejected. Write down the nuclear process taking place.
→
What is the acceleration due to gravity on the top of Mount Everest? Mount Everest is the highest mountain peak of the world at the height of 8848m. The value at sea level is 9.80m/s2.
→
Draw a ray diagram of a reflecting type telescope. State two advantages of this telescope over a refracting telescope.
→
When an electron revolving in its lowest energy level in the hydrogen atom moves to the third excited state, how is the de Broglie wavelength associated with it affected?
→
Current in a circuit falls from 5.0A to 0.0A in 0.1s. If an average emf of 200V induced, give an estimate of the self-inductance of the circuit.
→
The electric current in a charging R-C circuit is given by $\text{i}=\text{i}_0\text{e}^{-\frac{\text{t}}{\text{RC}}}$ where $\text{i}_0,$ R and C are constant parameters of the circuit and t is time. Find the rate of change of current at
  1. t = 0.
  2. t = RC.
  3. t = 10RC.
→
Define dielectric constant of a medium. What is the value of dielectric constant for a metal?
→
Show that the equipotential surfaces are closed together in the regions of strong field and far apart in the regions of weak field. Draw equipotential surfaces for an electric dipole.
→
In the decay 64Cu → 64Ni + e+ + v, the maximum kinetic energy carried by the positron is found to be 0.650MeV.
  1. What is the energy of the neutrino which was emitted together with a positron of kinetic energy 0.150MeV?
  2. What is the momentum of this neutrino in kg-m/s?
Use the formula applicable to a photon.
→
State with reason why a photodiode is usually operated at a reverse bias.
→