Ion A has charge and mass

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Ion A has charge

+3e

and mass

9m_p

, while ion B has charge

+e

and mass

3m_p

. Both ions are released from rest and accelerated through an electric potential difference of

120\,\text{V}

. What is the ratio of their final speeds

v_A/v_B

? (a)

3

(b)

\sqrt{3}

(c)

1

(d)

\dfrac{1}{\sqrt{3}}