Electric Circuits Answers

Electrical and electronics system play a very important role in our society. Identify the law governing the relationship in the operation of electrical system.

Bob and his uncle have researched ideas for a new quad trailer and gathered the tools and materials to build it, which step of the technological design process have they completed?

Indicate the best guideline for the prevention of slippage on belt drives.

Pneumatics and hydraulics involve cylinders with different diameters and surface areas. These cylinders are connected by means of tubes or pipes.The system is filled with liquid. The force transferred by the piston rod depends directly on:

Two circuits present the same resistance to the current. In one circuit the battery causing the flow of current has a voltage of 9.0 V, and the current is 3.0 A. In the other circuit the battery has a voltage of 1.5 V. What is the current in this other circuit?

A battery of potential store charges on a combination of two identical capacitor. What is the potential difference across and the charge on either capacitor if the capacitor are in parallel? Series?

. How much energy is stored in a 150µF capacitor if a 12V battery is connected across

it? How much charge is stored in this capacitor?

A uniform electric field of 500 N/C is established between two oppositely charged metal plates. A particle with a charge of +0.003 C is moved from the bottom (negatively charged) plate to the top plate. (Imagine that the string is tied to the charged that is pulling it upward). The distance between the plate is 5cm.

A. What is the change in the potential energy of the charge?

B. What is the change in electric potential from the bottom to the top plate?

The capacitors have values C1= 2.0 uf and C2= 4.0 uF, C3=5.0 uF C4= 7.0 uF and the potential difference across the battery is 9.0 V. Assume that the capacitors are connected in parallel?

1. How would you expect the resistivity of a good insulator such as glass or polystyrene to vary with temperature?

2. A fuse is a device that is designed to break the circuit. It melts when the current exceeds its value. What

characteristics should the material have?

1. Find the current density and drift velocity of free electrons when the particles travel on a copper conductor with a

square cross-section of 1.0 mm on the side and carries a current of 40 A to a 5 hp electric meter and its density of

6.0 x 1028 electrons/m3

2. Suppose the resistance is 1.47 Ω at a temperature of 20°C. Find the resistance at 0 degree Celsius.