Electrical Circuits: Current, Voltage, and Resistance

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Questions and Answers

What is the unit of measurement for current?

Amps (correct)
Ohms
Volts
Watts

How are ammeters connected in a circuit?

Directly to the power source
Independently from the circuit
In parallel
In series (correct)

What is the relationship between resistance and current?

Resistance can both increase and decrease current
Resistance decreases current (correct)
Resistance increases current
Resistance has no effect on current

What is the unit of measurement for resistance?

Ohms (B) Signup and view all the answers

What is the relationship between voltage and current according to Ohm's law?

Increasing voltage increases current (B) Signup and view all the answers

What is the relationship between resistance and current according to Ohm's law?

Increasing resistance decreases current (B) Signup and view all the answers

What is the circuit symbol for a variable resistor?

A zigzag line (C) Signup and view all the answers

Based on the information provided, which of the following statements about voltage is correct?

Voltage is the amount of energy shifted from the power source to the moving charge, or from the charge to the circuit component. (B) Signup and view all the answers

According to the information provided, how do electrical conductors and insulators differ in terms of resistance?

Electrical conductors have low resistance, while electrical insulators have high resistance. (B) Signup and view all the answers

What is the relationship between voltage and current according to Ohm's law?

Increasing the voltage gives the charges a bigger push, which increases the current. (C) Signup and view all the answers

What is the purpose of a variable resistor in an electrical circuit?

To change the resistance in the circuit. (C) Signup and view all the answers

What is the relationship between resistance and current according to the information provided?

Resistance decreases current. (D) Signup and view all the answers

How are voltmeters connected in an electrical circuit?

Voltmeters are connected in parallel. (C) Signup and view all the answers

Which of the following statements about electrical current is correct?

Current is the amount of energy shifted from the power source to the moving charge, or from the charge to the circuit component. (A) Signup and view all the answers