Use the information in the table about four different electric circuits to answer the question.
Circuit Resistance (ohms) Voltage (V)
1 0.5 20
2 0.5 40
3 0.25 40
4 0.25 60
Which circuit will have the greatest electric current?
(1 point)
Responses
circuit 1
circuit 1
circuit 3
circuit 3
circuit 4
circuit 4
circuit 2
Circuit 4 will have the greatest electric current because it has the lowest resistance and the highest voltage, which results in a higher current flow according to Ohm's Law (I = V/R).
Circuit A has a resistance of 7.5 ohms, and circuit B has a resistance of 5 ohms. Which statement about the circuits must be correct?(1 point)
Responses
If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is equal to the current in circuit B.
If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is equal to the current in circuit B.
If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the current in circuit B.
If the voltage of circuit A is equal to the voltage of circuit B, then the current in circuit A is less than the current in circuit B.
If the current in circuit A is less than the current in circuit B, then the voltage in circuit A is less than the voltage in circuit B.
If the current in circuit A is less than the current in circuit B, then the voltage in circuit A is less than the voltage in circuit B.
If the current in circuit A is equal to the current in circuit B, then the voltage in circuit A is less than the voltage in circuit B.
If the current in circuit A is less than the current in circuit B, then the voltage in circuit A is less than the voltage in circuit B.
This statement is correct because according to Ohm's Law (V = I*R), if the current in circuit A is lower than circuit B, and the resistance in circuit A is higher than circuit B, then the voltage drop in circuit A will also be less than in circuit B.
Which statement best defines the resistance of an electric circuit?(1 point)
Responses
It is the amount of electrical energy that is available in a circuit.
It is the amount of electrical energy that is available in a circuit.
It is the measurement of the rate of electrical energy in a circuit.
It is the measurement of the rate of electrical energy in a circuit.
It describes how much electrical energy passes in a circuit.
It describes how much electrical energy passes in a circuit.
It limits the amount of electrical energy that can pass through a circuit.
It limits the amount of electrical energy that can pass through a circuit.
It limits the amount of electrical energy that can pass through a circuit.
This statement best defines the resistance of an electric circuit. Resistance is a property of a material or component that limits the flow of electrical current through it, thereby restricting the amount of electrical energy that can pass through the circuit.
An electric circuit has an expected current of 80 amps. An electrician measures the current in the circuit at 120 amps. Which statement provides a possible explanation for this observation?(1 point)
Responses
There is not enough voltage in the circuit.
There is not enough voltage in the circuit.
The circuit has an extra resistor.
The circuit has an extra resistor.
A resistor in the circuit is broken.
A resistor in the circuit is broken.
There is not enough electrical energy in the circuit.
A resistor in the circuit is broken.
If the measured current in the circuit is higher than the expected current, it could be due to a broken or damaged resistor in the circuit, reducing the resistance and allowing more current to flow. This would explain the higher current reading by the electrician.