The potential of electrons in a circuit can be increased by
flowing through the conducting wires
the action of a battery
passing through a circuit element
water pressure

The potential of electrons in a circuit can be increased by the action of the battery.

Explanation:

A battery is a source of energy. It provides push to voltage so that the current can flow in the circuit.

For example, the electrical energy is used by the bulb connected in the circuit. The electrical energy is provided by the battery. If the energy of the battery is used up then no current will flow in the circuit. Then the bulb will not glow in this case.

Therefore, the  potential of electrons in a circuit can be increased by the action of the battery.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

this means that the temperature of both substances will be equal