Q19 · 2023 · Paper 1Simple familiar1 mark
QUESTION 19
Calculate the electric field strength experienced at a distance of 2.8 ×10-11 m from the centre of a helium nucleus.
(A)
1.0 ×102 N C-1
(B)
2.0 ×102 N C-1
(C)
3.7 ×1012 N C-1
(D)
7.3 ×1012 N C-1
WORKED SOLUTION
1 markAnswer C
ANSWER
C
Worked solution
A helium nucleus has charge . Using at m gives about N C. Option C.
Selects option C.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.