A coiled wire is to be used as an immersion heater for boiling water. The coil should operate at 220 V and is to heat 250 cm3 of water from 20° C to 100° C in 6.0 min. The specific heat capacity of water is 4190 J/(kg C°). a) What must be the resistance of the coil be (assumed as temperature independent)? b) What is the current flowing through the wire?
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
A coiled wire is to be used as an immersion heater for boiling water. The coil should operate at 220 V and is to heat 250 cm3 of water from 20° C to 100° C in 6.0 min. The specific heat capacity of water is 4190 J/(kg C°). a) What must be the resistance of the coil be (assumed as temperature independent)? b) What is the current flowing through the wire?
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