Question

What is Fleming's left-hand rule Mcq?

Answer 1

Fleming's Left-Hand Rule is used to determine the direction of force on a current-carrying conductor placed in a magnetic field. Here's an example of a multiple-choice question (MCQ) related to Fleming's Left-Hand Rule:

**Question:**  
Fleming's Left-Hand Rule helps to determine the direction of:

A) Magnetic field  
B) Current  
C) Motion or force on the conductor  
D) Voltage

**Answer:**  
**C) Motion or force on the conductor**

In Fleming's Left-Hand Rule, the thumb, forefinger, and middle finger are held perpendicular to each other:
- The **Thumb** indicates the direction of force (motion).
- The **Forefinger** represents the direction of the magnetic field.
- The **Middle finger** shows the direction of the current.

Answer 2

Fleming's Left-Hand Rule is a principle used in physics to determine the direction of force experienced by a current-carrying conductor in a magnetic field. It’s particularly useful in understanding the workings of electric motors. The rule can be summarized as follows:

- **Thumb:** Points in the direction of the force (motion) on the conductor.
- **First Finger:** Points in the direction of the magnetic field (from North to South).
- **Second Finger:** Points in the direction of the current (conventional current from positive to negative).

To use Fleming's Left-Hand Rule in an MCQ (Multiple Choice Question) format, you might be given a question that involves determining the direction of either the force, the magnetic field, or the current, given the other two directions.

### Example MCQ

**Question:** A current-carrying conductor is placed in a magnetic field. According to Fleming's Left-Hand Rule, if the current is flowing upwards and the magnetic field is directed from left to right, what is the direction of the force on the conductor?

**A)** To the right  
**B)** To the left  
**C)** Upwards  
**D)** Downwards

**Answer:** To solve this, you use Fleming's Left-Hand Rule:

1. Point your **first finger** in the direction of the magnetic field (left to right).
2. Point your **second finger** in the direction of the current (upwards).
3. Your **thumb** will then point in the direction of the force on the conductor.

With the magnetic field pointing from left to right and the current flowing upwards, your thumb (which represents the force) will point outwards.

**Answer: A) To the right.**

### Explanation

Fleming’s Left-Hand Rule is essential for understanding the interactions in electric motors, where electric current and magnetic fields are used to generate motion. The rule helps predict how the direction of force will change based on the direction of current and the orientation of the magnetic field.