Podcast
Questions and Answers
What quantity does Amp represent in electric circuits?
What quantity does Amp represent in electric circuits?
- Electromotive force
- Voltage
- Resistance
- Current (correct)
What is the relationship between voltage, current, and resistance in an electric circuit?
What is the relationship between voltage, current, and resistance in an electric circuit?
- Current is directly proportional to voltage and resistance
- Voltage is inversely proportional to current and resistance
- Voltage is directly proportional to current and inversely proportional to resistance (correct)
- Resistance is directly proportional to current and voltage
What type of circuit element is a voltage source?
What type of circuit element is a voltage source?
- Active element (correct)
- Dependent source
- Passive element
- Independent source
What is the main difference between an open circuit and a closed circuit?
What is the main difference between an open circuit and a closed circuit?
What type of circuit is characterized by an unintended path of low resistance?
What type of circuit is characterized by an unintended path of low resistance?
What is the purpose of passive elements in electric circuits?
What is the purpose of passive elements in electric circuits?
What is the unit of resistivity?
What is the unit of resistivity?
What is the relationship between current density and electric field?
What is the relationship between current density and electric field?
What is the inverse of resistivity?
What is the inverse of resistivity?
What type of materials obey Ohm's Law?
What type of materials obey Ohm's Law?
What is the measure of how much a conductor resists the flow of charges?
What is the measure of how much a conductor resists the flow of charges?
What is the relationship between resistivity and current density?
What is the relationship between resistivity and current density?
What is the relationship between the temperature coefficient of resistance and the nature of the material?
What is the relationship between the temperature coefficient of resistance and the nature of the material?
What is the formula for finding the resistance at a certain temperature, TF?
What is the formula for finding the resistance at a certain temperature, TF?
What is the unit of the temperature coefficient of resistance, α?
What is the unit of the temperature coefficient of resistance, α?
If the temperature coefficient of resistance, α, is given in terms of %/°C, how would you convert it to 1/°C?
If the temperature coefficient of resistance, α, is given in terms of %/°C, how would you convert it to 1/°C?
What is the relationship between the initial resistance, R₁, and the final resistance, R₂, at a certain temperature, TF?
What is the relationship between the initial resistance, R₁, and the final resistance, R₂, at a certain temperature, TF?
What is the resistance of an electromagnet winding of copper at 20°C if its resistance at 200°C is 30Ω?
What is the resistance of an electromagnet winding of copper at 20°C if its resistance at 200°C is 30Ω?
