Physics: Acharge q of 7.3 × 10^15 coulomb moves from point a to point b in an electric field. if the potential energy of the charge at point a is 3.5 × 10^-12 joules and that at point b is 1.3 × 10^-12 joules, what is the potential difference between point a and b? a. 1.3 × 10^2 volts b. 3.0 × 10^2 volts c. 3.5 × 10^3 volts d. 6.8 × 10^3 volts

The answer is 43/100, am i right or not?...

Acharge q of 7.3 × 10^15 coulomb moves from point - id7310152911025, tremainewoodley3030

joho38

05.01.2022

The charge is 7.3 × $10^{- 15}$ C

If we call E the potential energy and q the charge then we know that the potential (V) is:

$V = \frac{E}{q}$

So:

$V_A = \frac{3.5\ x\ 10^{-12}}{7.3\ x\ 10^{-15}}\\\\V_A = 479.45\ Volts\\\\V_B = \frac{1.3\ x\ 10 ^{-12}}{7.3\x\ 10 ^{-15}}\\\\V_B = 178.08\ Volts.$

Finally:

V_A - V_B = 479.45 - 178.08

$V_A - V_B = 301\ Volts\\\\V= 3.0\ x\ 10^2$

The answer is option B.

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