1 |
Two metallic sphere of radius 2 cm and 4 cm get equal quantity of charge. Which has greater surface charge density ? |
2<sup>nd</sup> sphere
Both have same
First sphere
None of these
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2 |
A force of 0.01 N is exerted on a charge 1.2 x 10-5 C at a certain point. The electric field at that point is |
1.2 x 10<sup>4</sup> N/C
1.2 x 10<sup>4</sup> C/N
8.3 x 10<sup>2</sup> N/C
8.3 x 10<sup>-2</sup> N/C
|
3 |
An electric field cannot deflect |
X-rays
a-particles
ß-particles
None of these
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4 |
If a charge body moved against the electric field it will again |
Potential energy
K.E
Mechanical Energy
Electric potential energy
|
5 |
Which one of the following is correct |
<br>
All of above
|
6 |
The relative permitivity of air is |
79.5
1.006
1.06
1.0006
|
7 |
The electric intensity due to two oppositely charged plates is |
None of these
|
8 |
The electric intensity at infinite distance from the point charge is |
Infinite
Zero
Positive
Negative
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9 |
Electric flux is a |
Vector quantity
Scalar quantity
Both (a) and (b)
None of above
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10 |
The photo copying process is called |
Xerography
Inkjet Printer
Both (a) and (b)
None of these
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11 |
The number of electrons in one coulomb charge is equal to |
6.2 x 10<sup>18</sup> electrons
Zero electrons
1.6 x 10<sup>-22</sup> electrons
6.2 x 10<sup>21</sup> electrons
|
12 |
Metals are good conductors of electricity because they have |
Large number of bounded electrons
Small number of electrons
Large number of free electrons
Small number of free electrons
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13 |
When the medium is insulator the elecrostatic force between the charges is |
Decreased
Zero
Increased
None of above
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