The electric field between the plates of a parallel plate capacitor when connected to a certain battery is E0. If the space between the plates of the capacitor is filled by introducing a material of dielectric constant K without disturbing the battery connections, the field between the plates shall be 

(1) K E0

(2) E0

(3) E0K

(4) None of the above

Subtopic:  Dielectrics in Capacitors |
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If the distance between parallel plates of a capacitor is halved and dielectric constant is doubled then the capacitance 

(1) Decreases two times

(2) Increases two times

(3) Increases four times

(4) Remain the same

Subtopic:  Dielectrics in Capacitors |
 84%
From NCERT
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If there are n capacitors each of capacitance C in parallel connected to V volt source, then the energy stored is equal to 

1. CV

2. 12nCV2

3. CV2

4. 12nCV2

Subtopic:  Energy stored in Capacitor |
 92%
From NCERT
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The unit of electric permittivity is 

(1) Volt/m2

(2) Joule/coulomb

(3) Farad/m

(4) Henry/m

Subtopic:  Capacitance |
 65%
From NCERT
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The work done in placing a charge of 8 × 10–18 coulomb on a condenser of capacity 100 micro-farad is 

(1) 32× 10–32 Joule

(2) 16 × 10–32 Joule

(3) 3.1 × 10–26 Joule

(4) 4 × 10–10 Joule

Subtopic:  Energy stored in Capacitor |
 82%
From NCERT
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A parallel plate capacitor of capacity \(C_0\) is charged to a potential \(V_0\)
(i) The energy stored in the capacitor when the battery is disconnected and the separation is doubled is \(E_1\)
(ii) The energy stored in the capacitor when the charging battery is kept connected and the separation between the capacitor plates is doubled is \(E_2\).
Then \(\frac{E_1}{E_2}\) value is:
1. \(4\)
2. \(\frac{3}{2}\)
3. \(2\)
4. \(\frac{1}{2}\)
Subtopic:  Energy stored in Capacitor |
 61%
From NCERT
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Two identical capacitors are joined in parallel, charged to a potential V and then separated and then connected in series i.e. the positive plate of one is connected to negative of the other 

(1) The charges on the free plates are destroyed

(2) The charges on the free plates are enhanced

(3) The energy stored in the system increases

(4) The potential difference in the free plates becomes 2V

Subtopic:  Combination of Capacitors |
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A parallel plate capacitor is made by stacking n equally spaced plates connected alternately. If the capacitance between any two plates is C then the resultant capacitance is

(1) C

(2) nC

(3) (n – 1)C

(4) (n + 1)C

Subtopic:  Combination of Capacitors |
 68%
From NCERT
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Four plates of equal area A are separated by equal distances d and are arranged as shown in the figure. The equivalent capacity is

(1) 2ε0Ad

(2) 3ε0Ad

(3) 4ε0Ad

(4) ε0Ad

Subtopic:  Combination of Capacitors |
 65%
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A parallel plate capacitor with air as medium between the plates has a capacitance of 10 μF. The area of capacitor is divided into two equal halves and filled with two media as shown in the figure having dielectric constant k1 = 2 and k2 = 4. The capacitance of the system will now be 

(1) 10 μF

(2) 20 μF

(3) 30 μF

(4) 40 μF

Subtopic:  Dielectrics in Capacitors |
 80%
From NCERT
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