How was the earth formed

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Area around a charged object where the objects can exert a force on another charged objects is an electric