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CBSE
Class 12 Physics
Electrostatic Potential And Capacitance
Quiz 2
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When a dielectric slab is introduced between the plates of a parallel plate capacitor which remains connected to a battery then charge on the plates relative to earlier charge is :
0%
more
0%
less
0%
less or may be more
0%
same
Explanation
more
Choose the vector physical quantity:
0%
Electric flux
0%
Electric potential
0%
Electric potential energy
0%
Electric intensity
Explanation
Electric intensity
The surface density of charge is measure:
0%
Cm
-1
0%
Cm
-2
0%
Cm
-3
0%
JC
-1
Explanation
Cm
-2
A polythene piece rubbed with wool is found to have a negative charge of 6.4 × 10
-9
c. How many electrons have been transferred during the process?
0%
4 × 10
12
0%
4 × 10
11
0%
4 × 10
10
0%
None of these
Explanation
4 × 10
10
In the above question:
0%
no electrons are transferred
0%
electrons are transferred from wool to x polythene
0%
electrons are transferred from polythene to wool
0%
nothing can be decided
Explanation
electrons are transferred from wool to x polythene
In previous question, mass transferred to polythene is:
0%
3.64 × 10
20
kg
0%
4 × 10
-28
kg
0%
4 × 10
10
kg
0%
None of these
Explanation
3.64 × 10
20
kg
What is the number of electrons in 100 g water?
0%
3.35 × 10
24
0%
3.35 × 10
25
0%
6.02 × 10
23
0%
None of these
Explanation
3.35 × 10
24
A uniform electric field of 10 NC
-1
exists in the vertically downward direction. What is the increase in the electric potential asonegoes up through a height of 300 cm?
0%
15 V
0%
30 V
0%
45V
0%
None of these
Explanation
30 V
The electric potential of earth is taken as:
0%
zero
0%
infinity
0%
unity
0%
None of these
Explanation
zero
A dielectric is placed in between the two parallel plates of a capacitor as shown in the figure. The dielectric constant of the dielectric being K. If the initial capacity is C, then the new capacity will be:
0%
(K + l).C
0%
K.C
0%
\(\frac{(K+1)}{2}\) C
0%
(k - l) C
Explanation
\(\frac{(K+1)}{2}\) C
0 h : 0 m : 1 s
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