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Electronics Resistance and Materials: Key Concepts and Calculations Exam UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

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Electronics Resistance and Materials: Key Concepts and Calculations Exam UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS Who developed the first chemical battery? - CORRECT ANSWER Alessandro Volta What is the base unit of voltage named after Alessandro Volta? - CORRECT ANSWER Volt What is the resistance of an electric motor winding using 200 m of copper conductor with a cross sectional area of 0.26 cm² at 20°C? - CORRECT ANSWER 0.132 ohms What is the resistivity of copper at 20°C? - CORRECT ANSWER 0. ohm-centimeter What is the primary function of resistors in electronic devices? - CORRECT ANSWER control the current What range of resistance values do resistors come in? - CORRECT ANSWER 10 to many millions of ohms In most electronic devices, how does the resistance of conductors compare to other parts? - CORRECT ANSWER It is so small that it can often be ignored. What is defined as opposition to electric current? - CORRECT ANSWER What happens to energy when current flows through resistance? - CORRECT ANSWER converted into heat energy. What are materials called that have no free electrons? - CORRECT ANSWER To From less than Resistance Insulators It is

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Electronics Resistance and Materials: Key
Concepts and Calculations Exam
UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Who developed the first chemical battery? - CORRECT ANSWER Alessandro Volta



What is the base unit of voltage named after Alessandro Volta? - CORRECT ANSWER Volt



What is the resistance of an electric motor winding using 200 m of copper conductor with a cross-
sectional area of 0.26 cm² at 20°C? - CORRECT ANSWER 0.132 ohms



What is the resistivity of copper at 20°C? - CORRECT ANSWER 0.00000172 ohm-centimeter



What is the primary function of resistors in electronic devices? - CORRECT ANSWER To
control the current



What range of resistance values do resistors come in? - CORRECT ANSWER From less than
10 to many millions of ohms



In most electronic devices, how does the resistance of conductors compare to other parts? -
CORRECT ANSWER It is so small that it can often be ignored.



What is defined as opposition to electric current? - CORRECT ANSWER Resistance



What happens to energy when current flows through resistance? - CORRECT ANSWER It is
converted into heat energy.



What are materials called that have no free electrons? - CORRECT ANSWER Insulators
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  • electronics resistance and materials
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