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Capacitors-DPP7(ISC)

Authored by salman undefined

Physics

12th Grade - University

Used 3+ times

Capacitors-DPP7(ISC)
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The capacitance of a parallel plate condenser does not depend on

Area of the plates

Medium between the plates

Distance between the plates

Metal of the plates

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An uncharged capacitor is connected to a battery. On charging the capacitor

All the energy supplied is stored in the capacitor

Half the energy supplied is stored in the capacitor

The energy stored depends upon the capacity of the capacitor only

The energy stored depends upon the time for which the capacitor is charged

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The capacitance of an air capacitor is  15μf15\mu f  the separation between the parallel plates is 6mm6mm  . A copper plate of  thickness 3mm is introduced symmetrically between the plates.  The capacitance now becomes 

 5μf5\mu f  

 7.5μf7.5\mu f  

 22.5μf22.5\mu f  

 30μf30\mu f  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The expression for the capacity of the capacitor formed by compound dielectric placed between the plates of a parallel plate capacitor as shown in figure, will be (area of plate=A )

ϵoA(d1k1+d2k2+d3k3)\frac{\epsilon_oA}{\left(\frac{d_1}{k_1}+\frac{d_2}{k_2}+\frac{d_3}{k_3}\right)}

ϵoA(d1+d2+d3k1+k2+k3)\frac{\epsilon_oA}{\left(\frac{d_1+d_2+d_3}{k_1+k_2+k_3}\right)}

ϵoA(k1k2k3)d1d2d3\frac{\epsilon_oA\left(k_1k_2k_3\right)}{d_1d_2d_3}

ϵo(Ad1k1+Ad2k2+Ad3k3)\epsilon_o\left(\frac{Ad_1}{k_1}+\frac{Ad_2}{k_2}+\frac{Ad_3}{k_3}\right)

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A parallel plate condenser with oil between the plates (dielectric constant of oil K=2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes

2 C\sqrt{2\ }C

2C

C2 \frac{C}{\sqrt{2\ }}

C2\frac{C}{2}

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Charge C

Potential V

Capacity C

Energy U

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Two protons A and B are placed in space between plates of a parallel plate capacitor charged upto V volts (See fig.) Forces on protons are  FAF_A    and FBF_B   , then 

 FA>FBF_A>F_B  

 FA<FBF_A<F_B  

 FA=FBF_A=F_B  

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