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Question

In Fleming's left hand rule, which physical quantity is represented by the middle finger?

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

Direction of electric current

The correct answer is option 3 i.e. Direction of electric current.

In Fleming's left-hand rule, the middle finger represents the direction of electric current. This rule is used to find the direction of force acting on a conductor carrying current when placed in a magnetic field. The left hand is positioned such that the thumb points in the direction of the force, the index finger points in the direction of the magnetic field, and the middle finger indicates the direction of electric current. This rule helps in understanding the relationship between current, magnetic field, and force in electromagnetic interactions.

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Similar Questions

  1. Which of the following household items does NOT use the heating effect of current?

  2. The magnetic field produced by a current-carrying wire at a given point depends on which of the following factors?

  3. If the resistance of a conductor is increased to three times, then the current will be: (voltage V remains constant)

  4. Which of the following statements is/are correct?

    Statements:

    I) A current carrying conductor acts like a magnet.

    II) Moving electrons perpendicular to the magnetic field do not experience any force.

  5. Which physical quantity represents the rate at which electric energy is dissipated or consumed in an electric circuit?

  6. The equivalent resistance of the series combination of R ohm and 5 ohm is 7 ohm. Here, R is _______.

  7. The work done in moving a charge +Q across two points having a potential difference K is:

  8. Which of the folloewing devices does NOT make use of current carrying conductor in a magnetic field ?

  9. Which of the following expressions is NOT correct for electric power?

  10. Which of the following is NOT a valid representation of electrical power P in a circuit? (The current, potential difference and resistance are written symbolically as I, V and R, respectively.)


Important Questions from Electricity

  1. 'Net metering' is sometimes seen in the news in the context of promoting the

  2. The complete form of 'IC' in electronics is
  3. Which of the following household items does NOT use the heating effect of current?

  4. The magnetic field produced by a current-carrying wire at a given point depends on which of the following factors?

  5. If the resistance of a conductor is increased to three times, then the current will be: (voltage V remains constant)

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