The two negative charges Q1 = –4.2 × 10–9 C and Q2 =–2.2 × 10–9 C are appearing at rest with d=44 cm apart. How much work must be done to move these two charges to a separation from 44 cm to 77 cm?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.