Electric Charges and Fields Test

Result

Electric Charges and Fields Test - 4

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Question 1
1 / -0

According to the principle of conservation of charge:

A
Charges cannot be created but can be destroyed

B
Charges can be created but cannot be destroyed

C
The algebraic sum of charges in any closed system is constant

D
The sum of charges in any system is constant

Solution

According to the principle of conservation of charge the algebraic sum of charges in any closed system is constant.
Question 2
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If an excess charge is placed on an isolated conductor, then, that amount of charge

A
gets neutralized.

B
resides on the surface of conductor.

C
move inside the conductor.

D
either resides on the surface of conductor or gets neutralized.

Solution

As the charge inside the conductor is zero, therefore extra charge stays on the outer surface of the conductor.
Question 3
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If electric field lines cross each other that would mean

A
The resultant electric field at a point is zero

B
Two directions for the electric field at one point which is not possible.

C
The direction of the field changes at that point

D
The electric field can be in either of the two directions.

Solution

If electric field lines cross each other that would mean, two directions for the electric field at one point is not possible.
Question 4
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Which of the following statement is true?

A
Electric field lines start from negative charge

B
Electric field lines intersect with each other.

C
Electric field lines for single positive charge are radiated inwards.

D
Electric field lines do not form closed loops.

Solution

From the properties of electric field lines we know that

(i) field lines always start from positive charges and end at negative charges,

(ii) two field lines never cross each other,

(iii) electric field lines for single positive charge are radiated outwards,

(iv) electric field lines do not form closed loops
Question 5
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Earthing or grounding means

A
sharing the charges with the earth

B
placing the apparatus with an insulating stand, on the ground

C
using green color to paint the body

D
connecting to a green colored wire

Solution

bringing a body in contact with the earth, generally by connecting a conductor to the body and connecting the other end to the earth.