Two point charges are fixed on the -axis: at and an unknown charge at

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two point charges are fixed on the

x

-axis:

Q_1 = +6.0\,\mu\text{C}

x = -0.30\,\text{m}

and an unknown charge

Q_2

x = +0.30\,\text{m}

. A sensor located at the point

(0,\,0.40\,\text{m})

measures an electric field of

3.5\times10^{5}\,\text{N/C}

directed straight upward (positive

y

-direction). Which of the following is closest to the value of

Q_2

? (a)

+12\,\mu\text{C}

(b)

-6\,\mu\text{C}

(c)

+6\,\mu\text{C}

(d)

+3\,\mu\text{C}