Which of the following is incorrect about electrostatic force?

1 it is conservative

2 it is a central force

3 Electrostatic field line never intersect

4 it also depends on the mass content of the body

 

Subtopic:  Coulomb's Law |
 85%
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Two charges each equal to nq(n-1<3) are placed at the corners of an equilateral triangle of side a. The electric field at the third corner is E3, where E0=q4πε0a2 is-

E3=E0

E3<E0

E3>E0

E3E0

Subtopic:  Electric Field |
 59%
From NCERT
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Given below are two statements: 

Statement I: The mass of a body is increased slightly when it is negatively charged.
Statement II: Charging is due to the transfer of electrons.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
Subtopic:  Electric Charge |
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Given below are two statements: 

Statement I: A positive point charge initially at rest in a uniform electric field starts moving along electric lines of forces.
Statement II: A point charge released from rest in an electric field moves along the lines of forces.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
Subtopic:  Electric Field |
From NCERT
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Given below are two statements: 

Statement I: Air is more elastic than iron.
Statement II: Elasticity is directly proportional to Bulk modulus. 
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.
Subtopic:  Electric Field |
 59%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
 
Assertion (A): Like charges may attract each other.
Reason (R): unlike charges always attract each other.


In the light of the above statements choose the correct answer from the options given below:
 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Coulomb's Law |
 61%
From NCERT
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Given below are two statements: 

Statement I: Net charge of an electric dipole is zero
Statement II: An electric dipole consists of two equal and opposite charges separated by a very small distance.
 
1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false.

 
Subtopic:  Electric Dipole |
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A: Two spherical conductors having the same surface charge density will have the same electric field near their surfaces due to their own charge.

R: Surface charge density is a charge per unit area

1 If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1)

2  If both Assertion & Reason are true but the reason is not  the correct explanation of the assertion, then mark(2)

3 If Assertion is a true statement but Reason is false, then mark(3)

4 If both Assertion and Reason are false statements, then mark(4)

Subtopic:  Electric Field |
 52%
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The electric potential in a certain region of space is given by V = –8x2 + 4x, where V is in volt and x is in metre. In this region, the equipotential surface is:

1.  plane parallel to yz plane
2.  plane parallel to the x-axis
3.  concentric circle centered at the origin
4. coaxial cylinder with axis parallel to the y-axis

Subtopic:  Equipotential Surfaces |
 63%
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In a region, volume charge density varies with radial distance r as p=Kr where K is positive constant. The electric field E Varies with the radial distance in the region as

1. Er

2. E1r2

3. Er2

4. Er0

Subtopic:  Electric Field |
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