Electric Charges and Fields Test

Result

Electric Charges and Fields Test - 10

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Question 1
1 / -0

In charging by Induction

A
a metallic object is charged by rubbing it with silk

B
a metallic object is charged by bringing a charged object near it

C
a metallic object is charged by rubbing it with fur

D
a metallic object by touching touching with a charged object

Solution

If a charged object placed near an uncharge object than redistribution of charge takes place in uncharge object and if we will earthed one surface of uncharged object than one charge goes to earth and other charge spread on its surface and it becomes charged.
Question 2
1 / -0

The unit of charge is

A
ohm

B
volt

C
ampere

D
coulomb

Solution

The SI unit of quantity of electric charge is the coulomb, which is equivalent to about 6.242×10¹⁸ e (e is the charge of a proton).
Question 3
1 / -0

Electric field lines can be said to be

A
drawing lines of electric fields

B
lines of equal electric field

C
lines of equal electric voltage

D
graphical representation of electric fields

Solution

Electric Field Lines can be defined as a curve which shows direction of electric field, when we draw tangent at its point. Electric field lines can be used to describe electric field around a system of charges in a better way.
Question 4
1 / -0

An electric dipole is

A
a pair of electric charges of equal magnitude q separated by a distance d

B
a pair of electric charges of equal magnitude q but positive sign, separated by a distance d

C
a pair of electric charges of equal magnitude q but opposite sign, separated by a distance

D
a pair of electric charges of equal magnitude q but negative sign, separated by a distance d

Solution

An electric dipole is a separation of positive and negative charges. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some (usually small) distance. A permanent electric dipole is called an electret.