# Power and Resistance

67 %
33 %

Published on March 16, 2009

Author: technolote

Source: slideshare.net

RESISTANCE

QUESTIONS TO ANSWER How can the resistance of an ohmic conductor be described? What about non-ohmic conductors? What is an ohm literally a measure of? (ie. something per something) What is Ohm’s law and does it apply to both ohmic and non-ohmic conductors?

QUESTIONS TO ANSWER Wires are designed to offer as little resistance as practially possible. Find out how the following characteristics of a wire affects its resistance: Length Diameter The type of metal used (eg. compare copper and silver) What is the equation that describes the relationship between these three factors? Design a more efﬁcient wire.

If normal household copper wiring is 1.8mm in diameter, use the formula from the previous question to ﬁnd out the resistance of a 10m long piece. Then ﬁnd out what voltage drop you would get if a current of 10A ﬂowed through it. Compare the voltage drop of the normal household wiring from above with a 10m length of your new and improved wiring. How much more efﬁcient is your wiring? Would it be worth the extra cost?

ENERGY AND POWER

CALCULATING ENERGY AND POWER What is the formula for calculating electrical energy? What is the unit it is measured in? What is the formula for calculating electrical power? What is the unit it is measured in? Convert joules into the more well-known unit for measuring power: kilowatt hour (kWh). How many joules are in 1kWh? How much does your household pay per kWh (refer to an electricity bill).

 User name: Comment:

## Related pages

### Voltage current resistance and electric power general ...

Electric power calculator calculation general basic electrical formulas mathematical voltage electrical equation formula for power calculating energy work ...

### Ohm's Law Calculations With Power - CSGNetwork

Ohm's Law Calculations With Power. ... Voltage Power Resistance Is it 3-Phase? (Do not enter R if circuit is 3-Phase.) Calculated Amperage.

### Power, Resistance and Conflict in the Contemporary World ...

eBook Shop: Power, Resistance and Conflict in the Contemporary World als Download. Jetzt eBook herunterladen & bequem mit Ihrem Tablet oder eBook Reader lesen.

### Resistor - Wikipedia, the free encyclopedia

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are ...

### Resistance | Define Resistance at Dictionary.com

Resistance definition, the act or power of resisting, opposing, or withstanding. See more.

### Power and Internal Resistance - University of Texas at Austin

Worked Examples Up: Electric Current Previous: Energy in DC Circuits Power and Internal Resistance Consider a simple circuit in which a battery of emf and ...

### Power, Resistance and Liberation in Therapy with Survivors ...

eBook Shop: Power, Resistance and Liberation in Therapy with Survivors of Trauma als Download. Jetzt eBook herunterladen & mit Ihrem Tablet oder eBook ...

### Abdoer twist power resistance kit - Super Teleshopping

Abdoer twist power resistance kit Wenn Sie die Muskulatur in Armen, Schultern, Brust und Rücken sowie in den inneren Oberschenkeln, der Hüfte und des Pos ...