ef152-rec-5-1

# ef152-rec-5-1 - Module 5 Recitation 1 Basic Circuits...

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EF 152 Spring, 2009 Recitation 5-1 1 Module 5, Recitation 1 Basic Circuits Voltage: measure of potential, measured in volts Current: rate of charge flow, measured in amps Power (watts): IV P = Fluids analogy Voltage: pressure Current: flow rate EF 152 Spring, 2009 Recitation 5-1 2 Volts and Amps What is the voltage in a typical electrical circuit (the type you plug an appliance into)? A. 10 V B. 50 V C. 110 V D. 220 V You plug a 1500 W hairdryer into the circuit. How many amps does the hairdryer draw? A. 13.6 A B. 110 A C. 165000 A Measure the voltage of an outlet using a voltmeter. __________ volts EF 152 Spring, 2009 Recitation 5-1 3 Volts and Amps To prevent excessive current (and a hazard), there are circuit breakers which trip if there the amperage is too high. At how many amps does a typical circuit breaker trip? A. 10 A B. 20 A C. 50 A D. 100 A To avoid excessive current, large appliances use a higher voltage circuit. What is the typical voltage of a clothes dryer circuit? A. 220 V B. 440 V C. 880 V D. 1000 V Where is 220 V a common voltage? ____________ EF 152 Spring, 2009 Recitation 5-1 4 AC/DC circuits AC: ____________________ DC: ____________________ What type of current is in your house? A. AC

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ef152-rec-5-1 - Module 5 Recitation 1 Basic Circuits...

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