The capacity of parallel plate condenser depends on 

(1) The type of metal used

(2) The thickness of plates

(3) The potential applied across the plates

(4) The separation between the plates

Subtopic:  Capacitance |
 72%
From NCERT
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The capacity of a parallel plate condenser is C. It's capacity when the separation between the plates is halved will be?

(1) 4 C

(2) 2 C

(3) C2

(4) C4

Subtopic:  Capacitance | Energy stored in Capacitor |
 88%
From NCERT
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Eight small drops, each of radius r and having same charge q are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is 

(1) 8 : 1

(2) 4 : 1

(3) 2 : 1

(4) 1 : 8

Subtopic:  Electric Potential |
 62%
From NCERT
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1000 small water drops each of radius r and charge q coalesce together to form one spherical drop. The potential of the big drop is larger than that of the smaller drop by a factor of 

(1) 1000

(2) 100

(3) 10

(4) 1

Subtopic:  Electric Potential |
 76%
From NCERT
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A parallel plate condenser is immersed in an oil of dielectric constant 2. The field between the plates is 

(1) Increased proportional to 2

(2) Decreased proportional to 12

(3) Increased proportional to 2

(4) Decreased proportional to 12 

Subtopic:  Dielectrics in Capacitors |
 78%
From NCERT
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If the dielectric constant and dielectric strength be denoted by k and x respectively, then a material suitable for use as a dielectric in a capacitor must have:

1. high k and high x.

2. high k and low x.

3. low k and low x.

4. low k and high x.

Subtopic:  Dielectrics in Capacitors |
 56%
From NCERT
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When air in a capacitor is replaced by a medium of dielectric constant K, the capacity -

(1) Decreases K times

(2) Increases K times

(3) Increases K2 times

(4) Remains constant

Subtopic:  Dielectrics in Capacitors |
 87%
From NCERT
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The capacity of a parallel plate capacitor increases with the 

(1) Decrease of its area

(2) Increase of its distance

(3) Increase of its area

(4) None of the above

Subtopic:  Capacitance |
 86%
From NCERT
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The radii of two metallic spheres P and Q are r1 and r2 respectively. They are given the same charge. If r1 > r2  , then on connecting them with a thin wire, the charge will flow 

(1) From P to Q

(2) From Q to P

(3) Neither the charge will flow from P to Q nor from Q to P

(4) The information is incomplete

Subtopic:  Electric Potential |
From NCERT
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Between the plates of a parallel plate condenser, a plate of thickness t1 and dielectric constant k1 is placed. In the rest of the space, there is another plate of thickness t2 and dielectric constant k2. The potential difference across the condenser will be 

(1) QAε0t1k1+t2k2

(2) ε0QAt1k1+t2k2

(3) QAε0k1t1+k2t2

(4) ε0QA(k1t1+k2t2)

Subtopic:  Dielectrics in Capacitors |
 67%
From NCERT
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