Electrostatic Potential and Capacitance Test

Result

Electrostatic Potential and Capacitance Test - 86

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Weekly Quiz Competition

Question 1
1 / -0

The equivalent capacitance between points A and B in the given figure would be :

A
$$2.5 \mu F$$

B
$$15\mu F$$

C
$$2.4 \mu F$$

D
none

Solution
Question 2
1 / -0

Find the capacitance between $$P$$ and $$O ( \mathrm { Fig } .4 .172 )$$ . Each capacitor has capacitance C.

A
$$2 C$$

B
$$3 C$$

C
$$8 C$$

D
$$6 C$$

Solution
Question 3
1 / -0

A $$5\mu F$$ is charged to $$12\ volt$$. The positive plate of The positive plate of the capacitor is connected to the negative terminal of a $$12\ V$$ battery. Then heat developed in the connecting wire will be:

A
$$2.44\ mJ$$

B
$$1.44\ mJ$$

C
$$0.44\ mJ$$

D
$$3.8\ mJ$$

Solution
Question 4
1 / -0

A,B,C,D are four large metallic plates carrying charges $$ +4 \mu C, -3 \mu C, 0, \mu C and +2 \mu C $$ placed close and parallel to each other as shown.The charge (in equilibrium) retained upon left side of left most plate is

A
$$ 3.00 \mu C $$

B
$$ 0.75 \mu C $$

C
$$ 1.5 \mu C $$

D
$$ -1.5 \mu C $$
Question 5
1 / -0

$$1\ MeV$$ equals

A
$$1.6\times 10^ {-19}\ J$$

B
$$1.6\times 10^ {-16}\ J$$

C
$$1.6\times 10^ {-13}\ J$$

D
$$1.6\times 10^ {13}\ J$$
Question 6
1 / -0

Four concentric conducting shells A,B,C and D are arranged as shown in figure A charge + q given to the outer most shell D.Shell B and D are connected by conducting wire while shell A and C is earthed.The equivalent capacitance of system is

A
$$ 64 \pi \varepsilon a_o $$

B
$$ 16 \pi \varepsilon_o a $$

C
$$ 4 \pi \varepsilon_o a $$

D
none of these

Solution
Question 7
1 / -0

A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?

A
North

B
East

C
West

D
South

Solution
Question 8
1 / -0

The figure shows a capacitor having three layers of equal thickness and same area is that of plate . Layer first is vaccum , layer second is conductor and layer third is dielectric of dielectric constant $$K$$ . The ratio of energy stored in region three to the total energy stored in capacitor is:

A
$$\dfrac { 1 } { K + 1 }$$

B
$$\dfrac { 3 } { K + 1 }$$

C
$$\dfrac { 4 } { K + 3 }$$

D
$$\dfrac { 4 } { 3K + 1 }$$

Solution
Question 9
1 / -0

The capacity between the point A and B in the adjoining circuit will be

A
$$\frac{2 C_1 C_2 + C_3(C_1 +C_2)}{C_1+C_2+2C_3}$$

B
$$\frac{C_1 C_2 + C_2C _3 +C_3 C_1}{C_1+C_2+C_3}$$

C
$$\frac{C_1 (C_2 + C_3)+ C _3( C_2+C_1)}{C_1+C_2+C_3}$$

D
$$C_1 C_2 C_3$$
Question 10
1 / -0

In the shown network, charges in capacitors are same. Then $$\dfrac{C_1}{C_2}$$ is

A
5 : 3

B
1 : 1

C
1 : 3

D
1 : 5

Solution