Electrostatic Potential and Capacitance Test

Result

Electrostatic Potential and Capacitance Test - 8

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Capacitance is defined as

A
charge²/voltage

B
charge/voltage²

C
charge/voltage

D
charge×voltage

Solution

Capacitance of any conductor is defined as the ratio of the charge given to the conductor to the potential developed in conductor.

C = Q/V
Question 2
1 / -0

For a parallel plate capacitor and a dielectric of dielectric constant K, when a dielectric material is inserted between the plates while charge is ______ , the potential difference between the plates decreases by a factor K.

A
varies continuously

B
increased

C
decreased

D
kept constant

Solution

When a dielectric material is introduced in between the plates of a charged capacitor, which is disconnected from the battery, the charge remains constant, while the potential decreases by a factor K. The charge on the plates will increase if the dielectric material is slipped in between the plates of a capacitor which remain connected to the battery. In this case, the potential across the plates of the capacitor remains constant being equal to the battery voltage.
Question 3
1 / -0

The dielectric constant K of an insulator can be

A
4.0

B
0.0

C
0.4

D
-4.0

Solution

Dielectric constant of an insulator is always greater than or equal to 1.
Question 4
1 / -0

The dielectric constant K of an insulator cannot be

A
4

B
6

C
9

D
infinity

Solution

Dielectric constant of a metal is infinity, and this is why the electric field inside a metal is zero. All other substances have a dielectric constant with values less than infinity but greater than 1.
Question 5
1 / -0

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

A
low K and high X

B
high K and high X

C
low K and low X

D
high K and low X

Solution

The capacitance of a capacitor increases with increase in the value of dielectric constant, C = K C_o.
Dielectric strength is the maximum electric field the material can withstand without breaking down.
A high value of X and a high value of K is preferable for use in capacitors.
Question 6
1 / -0

If one penetrates a uniformly charged solid metallic sphere, the electric field strength E

A
is zero at all points

B
increases

C
decreases

D
remains the same as at the surface

Solution

E decreases as we move from the surface of the sphere to its centre.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Electrostatic Potential and Capacitance Test - 8

Result

Electrostatic Potential and Capacitance Test - 8

Score

-

Rank

-

SHARING IS CARING

Question 1

charge2/voltage

charge/voltage2

charge/voltage

charge×voltage

Solution

Question 2

varies continuously

increased

decreased

kept constant

Solution

Question 3

4.0

0.0

0.4

-4.0

Solution

Question 4

4

6

9

infinity

Solution

Question 5

low K and high X

high K and high X

low K and low X

high K and low X

Solution

Question 6

is zero at all points

increases

decreases

remains the same as at the surface

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

charge²/voltage

charge/voltage²