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increase your battery bank voltage; it only increases the total capacity and the total stored energy. If each 12V battery was rated at 150 Amp hour (20Hr) the final string rating would be 12V 300AH with 3600 Watts of stored energy when discharged at a 20-hour rate to 100% DOD. “Volts x Amps = Watts”:
3. Calculate the power rating of a home appliance (in kilowatts) that uses 8 amps of current when plugged into a 120-volt outlet. 4. Calculate the power of a motor that draws a current of 2 A when connected to a 12 volt battery. 5. Your alarm clock is connected to a 120 volt circuit and draws 0.5 A of current. a.
What does the amp-hour capacity of a chemical battery represent? What does it mean if a battery is rated at, say, 150 amp-hours?
• The circuit diagram below (Figure 1) shows two resistors of 120 Ω and 360 Ω, in an electric blanket, connected in series. When tested with meters, a graph of results is produced (Figure 2) showing the voltage and current relationship for individual resistors (V1 and V2).
Voltage is the difference in charge between two points. Current is the rate at which charge is flowing. Resistance is a material's tendency to resist the flow of charge (current).
• Precise definitions of voltage and current. • Using Ohm’s Law to calculate voltage, current, and resistance. • Plotting measured and calculated data on graphs.
Formula: V (voltage)= I (current) X R (resistance) 1. What is the voltage if a resistance of 25 Ω produces a current of 250 amperes? 2. What is the current produced by a voltage of 240 V through a resistance of 0.2 Ω? 3. What voltage is necessary to produce a current of 200 amperes through a resistance of 100 Ω? 4.
