The figure shows electric field lines near two electric point charges. If Q_1 =

Question

The figure shows electric field lines near two electric point charges. If Q_1 = -3 nC, what is the value of Q_2? a. -6 nC b. + 6 nC c. + 3 nC d. -3 nC e. 0 Two flat 4.0 cm times 4.0 cm sheets carrying equal but opposite charges are 1.0 men apart. Between the sheets but not near their edges, the electric field strength is 1.3 times 10^6 N/C, what is the magnitude of the charge on each sheet? a. 16 nC b. 18 nC c. 30 nC d. 35 nC An initially-stationary electric dipole moment p = (4.00 times 10^-10 C middot m) i placed in an electric field E = (2.00 times 10^6 N/c) i + (2.00 times 10^6 N/C)j. What is the magnitude of the torque that the electric field exerts on the dipole? a. 2.00 times 10^-4 N middot m b. 140 times 10^-4 N middot m c. 8.00 times 10^-N middot m d 0.00 N middot m e. 100 times 10^-3 N middot m A solid block of metal in electrostatic equilibrium placed in a uniform electric field, Give a statement concerning the electric field in the block's interior. a. The interior filed points in a direction that is parallel to the exterior field. b. There is no electric field in the block's interior. c. The interior field points in a direction opposite to the exterior field. d. The interior field points in a direction that is at right angles to the exterior field. e. Not enough information is given to make a statement concerning the electric field on the interior.

Explanation / Answer

here,

1)

the number of electric feild lines from q1 is 4 and the number of feild lines from q2 is 8

so the magnitude of charge on q2 is twice the charge on q1

q2 = 2 * q1

q2 = 2 * 3 nC = 6 nC

and as the electric feild lines are towards the charge

the sign of charge is positive

so, the correct option is b) + 6nC

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