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Q.

What is the specific charge(e/m) of an electron?

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a

0.472 × 10⁸ coulombs/kg

b

17.6 × 10¹⁰ coulombs/kg

c

17.6 × 10⁸ coulombs/kg

d

0.96 × 10⁸ coulombs/kg

answer is A.

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Detailed Solution

Question Image

.Specific Charge is defined as e/m

For electron,

e=1.6×10⁻¹⁹C

m=9.1×10⁻³¹Kg

So, e/m_e = 1.76×10¹¹

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