ELECTRIC CHARGES & FIELDS MCQ

An infinite uniformly charged wire produces a field of  18 × 10⁴ N/C at a distance of 1 cm. The linear charge density is

• 1.0 x 10^-7 C/m

• 1.0 x 10^-9 C/m

• 1.12 x 10^-14 C/m

• 3.08 x 10^-15 C/m

• 5.0 mC

• 1.25 mC

• 2.0 mC

• 1.0 mC

• 5.6 x 10⁸ Vm

• 1.4 x 10⁸ Vm

• 22.4 x 10⁸ Vm

• 1.1 x 10⁸ Vm

• 0

• 1.1 x 10⁷ N/C

• 4.5 x 10⁸ C

• 2.2 x 10⁸ C

• 2.7 N

• 1.8N

• 0.9 N

• 3.6 N

• F

• 2F

Electric lines of force about negative point charge are

• Circular, anticlockwise

• Circular, anticlockwise

• Radial, outward

• Radial, inward

The given figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are E_A​ and E_B​ respectively and if the displacement between A and B is r, then

• E_A > E_B

• E_A < E_B

• E_A = E_B

Charges q, 2q, 3q and 4q are placed at the corners A, B, C and D of a square as shown in the following figure. The direction of electric field at the centre of the square is parallel to side.

• AB

• CB

• BD

• AC

Three infinitely long non-conducting charge sheets are placed as shown in figure. The electric field at point P is