Electrostatics

1. Which charge configuration produces a uniform electric field?

• Uniformly charged infinite plane

• Point charge

• Inifiniteuniform line charge

• Uniformly charged spherical shell

2. The total electric flux for the following closed surface which is kept inside water

• 80 q/€_o

• q/40 €_o

• q/80 €_o

• q/160 €_o

Answer explanation

3. What is the ratio of the charges ( q_1/q₂ ) for the following electric field line pattern?

• 11/25

• 25/11

• 5/11

• 1/5

Answer explanation

4.Two identical point charges of magnitudes -q are fixed as shown in the figure below. A third charge +q is placed in the midway between the two charges at the point P. Suppose this charge +q is displace a small distance from the point P in the direction indicated by the arrows, in which direction(s) will +q be stable with respect to the displacement?

• A₁ and A2

• B1 and B2

• Both directions

• No stable

Answer explanation

5.An electric dipole is placed at an alignment angle of 30⁰

with an electric field 2 * 10^5.

NC^-1. It experiences a torque equal to 8 N m. The charge of the dipole if the dipole length is 1 cm is

• 4 mC

• 8mC

• 5mC

• 7mC

Answer explanation

6.

• D<C<B<A

• A<B=C<D

• C<A=B<D

• D>C>B>A

Answer explanation

7.

• Less than before

• Same as before

• More than before

• Zero

Answer explanation

8.

• 1 =4 <2 <3

• 2=4<3<1

• 2=3<1<4

• 3<1<2<4

Answer explanation

9.

• +10V

• -20V

• +20V

• -10V

Answer explanation

10.

• 
• 
• 
• 

Answer explanation