An alternating current, when passed through a resistor immersed in water for 4 minutes, just raised the temperature of the water to boiling point. When a direct current of 4A was passed through the same resistor under identical conditions, it took 8 minutes to boil the water. Find the r.m.s. value of the alternating current. Neglect factors other than heat given to the water. If a rectifier type of ammeter connected in series with the resistor reads 5.2A when the alternating current was flowing, find the form factor of the alternating current.
An alternating current, when passed through a resistor immersed in water for 4 minutes, just raised the temperature of the water to boiling point. When a direct current of 4A was passed through the same resistor under identical conditions, it took 8 minutes to boil the water. Find the r.m.s. value of the alternating current. Neglect factors other than heat given to the water. If a rectifier type of ammeter connected in series with the resistor reads 5.2A when the alternating current was flowing, find the form factor of the alternating current.
Chapter59: Motor Startup And Troubleshooting Basics
Section: Chapter Questions
Problem 12SQ: How is a solid-state diode tested? Explain.
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An alternating current, when passed through a resistor immersed in water for 4
minutes, just raised the temperature of the water to boiling point. When a direct
current of 4A was passed through the same resistor under identical conditions, it took
8 minutes to boil the water. Find the r.m.s. value of the alternating current. Neglect
factors other than heat given to the water. If a rectifier type of ammeter connected in
series with the resistor reads 5.2A when the alternating current was flowing, find the
form factor of the alternating current.
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