Question

Example 2: To move charge q from point a to point b requires -30J. Find the voltage drop vh if: (a) q = 6 C, (b) q - -3 C.

Answer 1

Work Done = W = Voltage Drop * Charge

W = V * Q

Therefore,

$Voltage Drop V = \frac{W}{Q}$

Given W = 30 J

Solution [a]

When Q = 6C

$Therefore, Voltage Drop V = \frac{W}{Q} = \frac{30}{6} = 5V$

Voltage Drop = 5V

Solution [b]

When Q = -3C

$Therefore, Voltage Drop V = \frac{W}{Q} = \frac{30}{-3} = -10 V$

Voltage Drop = -10 V