Currents 4

1. A steam turbine at an electric power plant delivers 4500 kW of power to an electrical generator that converts 95 percent of this mechanical energy into electrical energy. What is the current delivered by the generator if it delivers energy at 3600 V? 2. A color television draws about 2.5 A when it is connected to a 120 V outlet. Assuming electrical energy costs $0.06 per kW*h, what is the cost of running the TV for exactly 8 h? Please show work, formulas used and the answers! Thank you.

Resistance

1. See attachment. 2. See attachment. 3. Three resistors are connected in series. Then they are connected in parallel. In which configuration will the resistance be greatest? a. series b. parallel c. It won't make any difference 4. See attachment. 5. See attachment.

Resistors 2

Problems: See attachment. Please show the formulas used, work done and the answers! Thank you!

Magnetic Field

1. ____ magnetic polies atytract, and _____ magnetic poles repel. A. like, opposite B. Opposite, opposite C. like, like D. opposite, like 2. The shape of the magnetic field surrounding a current carrying wire is A. a circle B. a square C. a rectangle D. an oval 3. The strength of a magnetic field is measured in A. a circle B. a square C. a rectangle D. an oval 4. The force on an electronmoving at right angles through a magnetic field is A. out of the palm according to the right hand rule. B. out of the back of the hand according to the right hand rule C. along the direction of the fingers according to the right hand rule D. along the direction of the thumb a... click for more

magnetic 2

7. If the magnetic field is represented by exes, it is a. directed to the left b. going away from you c. pointing west d. coming out of the plane of the page at you 8. A magnetic field is represented by a group of exes on the page, with an arrow to the right representing the velocity of a proton. How would the force exerted by the magnetic field be shown? 1. The shape of the magnetic field surrounding a current carrying wire is a. a circle b. a square c. a rectangle d. an oval 2. The strength of a magnetic field is measured in a. ergs b. dynes c. Newtons d. Teslas a. an arrow pointing to the bottom of the page b. an arrow pointing to the top of the page c. a ... click for more