Directions: Write the letter of the correct answer. _1. What type of energy transformation is involved in an electric motor? A. mechanical to chemical C. electrical to mechanical D. chemical to mechanical B. mechanical to electrical 2. What type of energy conversion is involved in an electric generator? A. mechanical to chemical C. electrical to mechanical D. chemical to mechanical B. mechanical to electrical _3. What basic principles enable generators to operate? A. Iron is the only element that is magnetic. B. Opposite electric charges attract and like charges repel. C. A current-carrying wire placed within a magnetic field will experience a magnetic force. D. A closed- loop conductor within a changing magnetic field will have an induced voltage.

. A clamp-on ammeter is placed around a conductor and the meter indicates that there is 10A of current flowing through the conductor. If the wire were wrapped into 10 loops and the clamp-on ammeter were clamped around the 10 loops, what value of current would the clamp-on ammeter indicate? A. 10A B. 1A C. 0A D. 100A     I NEED TYPED ANS NOT HANDWRITTEN  ANS IN DETAIL

Suppose a battery operates a 2.25 W electric clock for 19.5 months. 1. What is the available energy content, in joules, of the battery? 2. How many years can a battery that supplies 7.75 × 104 J run a pocket calculator that consumes energy at the rate of 1.05 × 10-3 W?

2. To explore resistors in series and parallel, we will use a virtual lab for DC circuits. Open your web browser and go to the following site: https://phet.colorado.edu/sims/html/circuit-construction-kit-dc/latest/circuit-construction- kit-dc_en.html (a) Construct a circuit with resistors (or light bulbs) in series and record current and voltage. How does the current through the resistor (or the bulb) in a single-resistor circuit with the current through the same resistor when it is connected in compare series with a second resistor? (b) Now construct a circuit with resistors (or light bulbs) in parallel and record current and voltage. Compare the current through the battery in the series circuit with the current through the battery in the parallel circuit. Is it lower, the same, or higher?