The question asks about a fundamental law in physics that describes the relationship between electric current and potential difference across a metallic conductor when the temperature is constant. We are provided with four options to identify this law:
- Ampere's law: This law relates the integrated magnetic field around a closed loop to the electric current passing through it. It is a fundamental law of magnetism and does not pertain to the direct relationship between current and potential difference in a conductor.
- Ohm's law: This is the correct answer, as Ohm’s law states that the current (\(I\)) flowing through a conductor between two points is directly proportional to the voltage (\(V\)) across the two points, provided the temperature remains constant. Mathematically, it is expressed as: \(V = IR\), where \(R\) is the resistance of the conductor.
- Coulomb's law: This law describes the electrostatic interaction between electrically charged particles. It is not related to the direct relationship between current and potential difference.
- Joule's law: This law concerns the heat produced by an electric current passing through a conductor. It is not directly describing the relationship between current and potential difference.
Hence, the correct answer is Ohm's law.
To summarize: Ohm’s law is a pivotal law in the field of electricity, fundamental to understanding how electrical circuits operate. It establishes a direct proportionality between voltage and current in a metallic conductor, controlling for resistance, when the conditions are maintained at a constant temperature.
Similar Questions
Fill in the blank with the most appropriate option.
18 volts = _________ × 3 ohms.
- ______ states that the electric current flowing through a metallic wire is directly proportional to the potential difference ‘V’ across its ends provided its temperature remains the same.
According to Ohm's Law, which of the following is true?
According to Ohm's Law, how is current related to voltage and resistance?
- For a given potential difference (V), current (I) and resistance (R) across a conductor, Ohm's law is represented as:
A source of voltage V maintains a current I in a circuit. The power (P) input to the circuit by the source is given by:
Find the potential difference (in V) across a resistance of 2.5 kΩ through which a 2 mA current flows.
According to Ohm’s law, if current (I) increases and potential difference (V) remains constant, then:
Important Questions from Ohm’s Law
Three resistors having resistances in the ratio 1 : 2 : 3 are in parallel. The current through the resistors are in the ratio
Which of the law states that in any closed circuit the current is directly proportional to the voltage, provided the physical conditions of the circuit are kept constant?
Fill in the blank with the most appropriate option.
18 volts = _________ × 3 ohms.
- ______ states that the electric current flowing through a metallic wire is directly proportional to the potential difference ‘V’ across its ends provided its temperature remains the same.
The graphs between current (I) and voltage (V) for three linear resistors 1, 2 and 3 are given below:
If R 1, R 2and R 3are the resistances of these resistors, then which one of the following is correct?
