A. 1.41eV
B. 1.71eV
C. 1.61eV
D. 1.51eV

Correct Answer:

Option D – 1.51eV

Explanation

E = Eo/n² = 13.6/3² = 13.6eV/9

= 1.51eV

SEE ALSO  A body of mass 8kg moving with a speed of 30ms-1 is brought to rest in 2.5s by a constant retarding force. Calculate the magnitude of the force.

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