Electric field

The unit of Electric Field is

• N/C
• J
• J/m
• J/C

What is the angle between electric dipole moment and Electric Field , when the dipole is in stable equilibrium

• 0
• π/4
• π/2
• π

Calculate the force on a proton in a uniform electric field of 3x10 N/C?

• 48x10-19 N
• 78.6x10-15 N
• 44.8x10-15 N
• 8x10-15 N

An electric dipole with electric dipole moment 4x10 -9 C m is aligned at 30 degree with the direction of uniform electric field of magnitude 5x10 4 N/C , calculate the magnitude of the torque acting on the dipole

• 10 -2 Nm
• 10 -4 Nm
• 10 -3 Nm
• 10 -5 Nm

If an electric dipole is placed in a uniform electric field , it experiences

• both torque and net force
• net force only
• Torque only
• neither torque nor net force

What is the angle between electric dipole moment and Electric Field strength due to it on the axial line

• 0 degree
• 90 degree
• 180 degree
• None of these

Calculate the electric field strength required to just support a water drop of mass 10-5 kg and having charge 1.6x10-19 C

• 8.125x1010 N/C
• 5.125x1022 N/C
• 6.125x10 14 N/C
• 6.125x1012 N/C

A particle of mass 10-3 kg and charge 5 µC is thrown at speed 20m/s against uniform electric field of strength 2x10 5 N/C , How much distance will it travel before coming to rest

• 0.2m
• 0.4m
• 1.0m
• 2.0m

Which of the following is a property of electric field lines

• Field lines are continuous curves without any breaks.
• Two field lines cannot cross each other
• Field lines start at a positive charge and end at negative charge
• All of these

Electric Dipole Moment is

• Scalar
• Vector
• Tensor
• None of these