Electric Charges and Field

Which of the following statements is false about electric field lines

• electric field lines cannot cross

• electric field lines point away from positive charge

• electric field lines are always straight lines

• electric field lines show how a proton would move in an electric field

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

• +,+

• +,-

• -,+

• -,-

Which graph best represents the relationship between the strength of an electric field and distance from a point charge?

• 
• 
• 
• 

What is the S. I. unit of electric flux?

• Nm²C⁻¹

• NmC−¹

• Nm⁻²C²  

• NmC⁻²  

According to Quantization of charge

• Q=ne

• Q=ne²

 

For a short dipole the relation between electric field a point on the axial point and on the equatorial point is

• ​E_eq = e_ax

• E_eq = 2 E_ax

• E_eq = E_ax + 2

• E_ax = 2 E_eq

What do you call the process of charging a conductor by bringing it near another charged object?

• conduction

• induction

• polarization

• neutralization

An electron and a proton are in a uniform electric field, the ratio of their accelerations will be

• Zero

• The ratio of the masses of electron and proton

• Unity

• The ratio of the masses of proton and electron

The unit of electric field is not equivalent to

• N/C

• V/m

• J/C

• J/C-m

What will be the value of electric field at the centre of the electric dipole : -

• Zero

• Equal to the electric field due to one charge at centre

• half the value of electric field due to one charge at centre

• wice the electric field due to one charge at centre