Question

A point charge 50 C is located in the x-y plane at the position vector r0  (2
ˆ
i  3
ˆ
j)m

. The electric field at
the point of position vector r  (8
ˆ
i  5
ˆ
j) m

, in vector from is equal to


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Answer 1

Answer:

Correct option is

D

4500V/m

Electric field due to a point charge q is, E=

4πϵ

0

1

r

2

q

here, q=50μC,

r

=(8−2)

i

^

+(−5−3)

j

^

=6

i

^

−8

j

^

,r=∣

r

∣=

6

2

+8

2

=10

∴E=

4π(8.854×10

−12

)

1

10

2

50×10

−6

=4496.15∼4500V/m

Explanation:

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