Calculate work done in taking a charge -2 × 10^{-9} ,C from A to B via C is ......... (in diagram)

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1. Electric Charges and Fields

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Calculate the work done in taking a charge $-2 \times 10^{-9} \,C$ from $A$ to $B$ via $C$ is ......... (in diagram)

A

$0.2$

B

$1.2$

C

$2.2$

D

$0$

Solution

(b)

$V_A=\frac{9 \times 10^9 \times 8 \times 10^{-3}}{3 \times 10^{-2}}=24 \times 10^8 \,V$

$V_B=\frac{9 \times 10^9 \times 8 \times 10^{-3}}{4 \times 10^{-2}}=18 \times 10^8 \,V$

$\Delta W=-2 \times 10^{-9}\left(-6 \times 10^8\right)$

$\Delta W=12 \times 10^{-1} \,J$

$\Delta W=1.2\,J$

Standard 12

Physics

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