A Helium Nucleus Is Located Between the Plates of a Parallel-Plate

question 52

Multiple Choice

A helium nucleus is located between the plates of a parallel-plate capacitor as shown. The nucleus has a charge of +2e and a mass of 6.6 × 10^-27 kg. What is the magnitude of the electric field such that the electric force exactly balances the weight of the helium nucleus so that it remains stationary?

• A)4.0 × 10^-7 N/C
• B)6.6 × 10^-26 N/C
• C)2.0 × 10^-7 N/C
• D)5.0 × 10^-3 N/C
• E)1.4 × 10^-8 N/C

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