12th Class Physics MCQS
Presence of dielectric always.
Doubles the electrostatic force
Do not effect electrostatic force
Reduces the electrostatic force
Increase the electrostatic force
Force per unit charge is called:
Gravitational force
Coulomb’s force
None of these
Electric field intensity
The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (
? increases linearly in the direction of the electric field
? has a uniform value throughout the region
? decreases linearly in the direction of the electric field
? = 0
Dielectric constant ?r for air is:
1.006
1
1.0002
1.0006
The number of lines per unit area passing perpendicular through an area is called
None of these
Flux
Both (a) , (b)
Electric intensity
A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:
4 x 10-3j
2 x 10-3j
8 j
16 j
The process of copying is:
Spectrography
Axillugraphy
Chromatography
Xerography
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