Which of the following statements about Ohm’s Law is true?
A. Keeping the same voltage and decreasing resistance decreases the current.
B. To increase the current, decrease the resistance.
C. Ohm’s law relates power, current and resistance.
D. Increasing the voltage decreases current if resistance stays the same
I am not sure but I think it is B.
you think correctly.
I=V/R
The correct answer is B. To increase the current, you need to decrease the resistance. According to Ohm's Law, the current (I) flowing through a conductor is directly proportional to the voltage (V) across the conductor and inversely proportional to the resistance (R) of the conductor. Mathematically, Ohm's Law is expressed as I = V/R. By decreasing the resistance (R), you can increase the current (I) for a given voltage (V).
That's correct! Statement B is true: To increase the current, you need to decrease the resistance. Let me explain Ohm's Law, which will help confirm your answer.
Ohm's Law is a fundamental principle in electrical engineering and physics that relates voltage (V), current (I), and resistance (R) in an electrical circuit. It states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance.
Mathematically, Ohm's Law can be expressed as:
I = V / R
Where:
- I represents the current in the circuit, measured in amperes (A).
- V represents the voltage across the conductor, measured in volts (V).
- R represents the resistance of the conductor, measured in ohms (Ω).
Now, let's analyze each of the statements to determine which one is true:
A. Keeping the same voltage and decreasing resistance decreases the current.
This statement is false. According to Ohm's Law, if the voltage remains the same, decreasing the resistance will actually increase the current flowing through the circuit.
B. To increase the current, decrease the resistance.
This statement is true. Again, according to Ohm's Law, if you decrease the resistance in a circuit while keeping the voltage constant, the current will increase. So, statement B is correct.
C. Ohm's law relates power, current, and resistance.
This statement is false. While Ohm's Law is an important relationship in electrical circuits, it does not directly relate to power. Power (P) is calculated using a different formula: P = V * I, where V is the voltage and I is the current.
D. Increasing the voltage decreases current if resistance stays the same.
This statement is false. According to Ohm's Law, if you increase the voltage while keeping the resistance constant, the current will also increase.
In conclusion, statement B is the correct one. To increase the current in a circuit, you need to decrease the resistance, as stated by Ohm's Law.