ELECTRONICS RESISTANCE AND MATERIALS: KEY CONCEPTS AND CALCULATIONS UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

ELECTRONICS RESISTANCE AND MATERIALS: KEY
CONCEPTS AND CALCULATIONS UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. Who developed the first chemical battery?
Answer:
Alessandro Volta

Question:
2. What is the base unit of voltage named after Alessandro Volta?
Answer:
Volt

Question:
3. 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?
Answer:
0.132 ohms

Question:
4. What is the resistivity of copper at 20°C?
Answer:
0.00000172 ohm-centimeter

Question:
5. What is the primary function of resistors in electronic devices?
Answer:
To control the current

Question:
6. What range of resistance values do resistors come in?
Answer:
From less than 10 to many millions of ohms

Question:
7. In most electronic devices, how does the resistance of conductors compare to other parts?
Answer:
It is so small that it can often be ignored.

Question:
8. What is defined as opposition to electric current?
Answer:
Resistance