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Question

Two non-conducting concentric spherical shells having uniform charge distribution +Q and –Q over their surface are shown in figure. A point charge q is taken slowly from point P to infinity. The work done by external agent in this process is equal to (k=14πε0)

दो अचालक संकेन्द्रीय गोलीय कोशों के पृष्ठ पर एकसमान आवेश वितरण चित्रानुसार +Q तथा –Q हैं। एक बिंदु आवेश q को धीरे-धीरे बिंदु P से अनन्त तक लाया जाता है। इस प्रक्रिया में बाह्य कारक द्वारा किया गया कार्य है (k=14πε0)

A
kQq4a
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B
kQq2a
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C
kQq3a
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D
kQq6a
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Solution

The correct option is D kQq6a
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