A commercial resistor can safely dissipate power only up to a certain rated value. Beyond this value, the resistor becomes excessively hot and often cracks apart. The resistor used in this experiment was rated by the manufacturer to be a 2 watt resistor. What is the largest voltage that can safely be applied across the resistor? Hint: The power P dissipated by a resistor R is given by P = I2R = V2R = IV where I is the current and V is the voltage.
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A 120.0 ohm resistor, a 60.0 ohm resistor, and a 40.0ohm resistor are connected in parallel and placed across a 12.0-V battery. What is the current of the entire circuit?
a.
0.800 A
c.
0.600 A
b.
1.26 A
d.
0.062 A
a.
0.800 A
c.
0.600 A
b.
1.26 A
d.
0.062 A
1 answer