30. Theine Focus What happens to the mat netic force as the dintance between two magnetic poles decreases A) It remains constant. 2) It decreases. C) It increases. D) It decreases then fincreases. 31. Which describes the direction of the elec. tric current in AQ A) It is constant. B) It is direct. C) It varies regularly. D) It varies irregularly. 32. Which is not part of a generator? A) wire coil C) turbine B) magnet D) battery

## Step1<br />For question 30, we need to understand the relationship between the magnetic force and the distance between two magnetic poles. According to the inverse square law, the magnetic force between two magnetic poles is inversely proportional to the square of the distance between them. This means that as the distance between the poles decreases, the magnetic force increases.<br /><br />## Step2<br />For question 31, we need to understand the direction of the electric current in a circuit. The direction of the electric current in a circuit is typically direct, meaning it flows in one direction. This is the case in most conventional circuits, where the current flows from the positive terminal to the negative terminal of a power source.<br /><br />## Step3<br />For question 32, we need to identify which component is not part of a generator. A generator typically consists of a wire coil, a turbine, and a magnet. These components work together to convert mechanical energy into electrical energy. A battery, however, is not a part of a generator. It is a separate device that stores electrical energy.