An electron moves from the positive to the negative terminal of a battery (9 V). How much potential energy did it gain or lose ?

Explanation

To solve the problem of how much potential energy an electron gains or loses when moving from the positive to the negative terminal of a 9 V battery, we can follow these steps:

### Step 1: Understand the concept of electric potential and potential energy
Electric potential (V) is defined as the work done per unit charge in moving a charge from one point to another in an electric field. The potential energy (U) associated with a charge in an electric field can be calculated using the formula:
\[ U = V \times Q \]
where \( U \) is the potential energy, \( V \) is the electric potential (in volts), and \( Q \) is the charge (in coulombs).

### Step 2: Identify the charge of the electron
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