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Question

According to Ohm's Law, how is current related to voltage and resistance?

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

It is directly proportional to voltage and inversely proportional to resistance.

Ohm's Law is a fundamental principle in physics, described by the equation: I = V/R, where I represents current in amperes, V is voltage in volts, and R is resistance in ohms. According to this law, the current flowing through an electric circuit is directly proportional to the voltage across the circuit and inversely proportional to the resistance within the circuit.

To understand the relationship, let's analyze the components of the equation:

  • Directly Proportional to Voltage: If the resistance remains constant and the voltage increases, the current also increases, implying a direct relationship between current and voltage.
  • Inversely Proportional to Resistance: If the voltage remains constant and the resistance increases, the current decreases, indicating an inverse relationship between current and resistance.

Thus, the correct statement is: It is directly proportional to voltage and inversely proportional to resistance.

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Similar Questions

  1. Find the potential difference (in V) across a resistance of 2.5 kΩ through which a 2 mA current flows.

  2. For a given potential difference (V), current (I) and resistance (R) across a conductor, Ohm's law is represented as:
  3. According to Ohm’s law, if current (I) increases and potential difference (V) remains constant, then:

  4. Fill in the blank with the most appropriate option.

    18 volts = _________ × 3 ohms.

  5. According to Ohm's Law, which of the following is true?

  6. ______ 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.
  7. _____ 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.
  8. 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:


Important Questions from Ohm’s Law

  1. Find the potential difference (in V) across a resistance of 2.5 kΩ through which a 2 mA current flows.

  2. Three resistors having resistances in the ratio 1 : 2 : 3 are in parallel. The current through the resistors are in the ratio

  3. For a given potential difference (V), current (I) and resistance (R) across a conductor, Ohm's law is represented as:
  4. 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?

  5. According to Ohm’s law, if current (I) increases and potential difference (V) remains constant, then:

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