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Unit test ( Electrostatics) 2020

Authored by Kamal Pandhi

Physics

12th Grade

Used 6+ times

Unit test ( Electrostatics) 2020
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12 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The dielectric constant of metals is

1

Greater than 1

Zero

Infinite.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An electric dipole moment p is lying along a uniform electric  field  E\overrightarrow{E}  . The work done in rotating the dipole by  90°90\degree  is:

 pE

 2\sqrt{2}  pE

 pE2\frac{\text{pE}}{2}  

2pE

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the angle between electric dipole moment and the electric field strength due to electric dipole on the equatorial line?

 0°0\degree  

 90°90\degree  

 180°180\degree  

None of these

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The insulation property of air breakdown is E=3 X 10610^6 V/m. The maximum charge in coulomb that can be given to a sphere of diameter 5m is approximately:

2 X  10210^{-2}  C

2X 10310^{-3}  C

2 X  10410^{-4}  C

2 X  10510^{-5}  C 

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

There is an electric field in the X - direction. If the work done in moving a charge of 0.2 C through a distance of 2m along a line making an angle of  60°60\degree  with X - axis is 4J, then what is the value of E?

  3\sqrt{3}  N/C

4 N/C

5 N/C

20 N/C

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The electric field at a distance  3R2\frac{3R}{2}  From the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance  R2\frac{R}{2}  from the centre of the sphere is: 

Zero

E

 E2\frac{E}{2}  

 E3\frac{E}{3}  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A hollow cylinder has a charge q coulomb with it.  ϕ\phi  Is the electric flux in units of V/m associated with the curved surface B, the flux linked with the plane surface A in units of V m will be:

 ϕ3\frac{\phi}{3}  

 q20\frac{q}{2\in_0}  

 12[q0ϕ]\frac{1}{2}\left[\frac{q}{\in_0}-\phi\right]  

 q0ϕ\frac{q}{\in_0}-\phi  

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