Fleming's left and right hand rules are used in:

Options

A. DC motor and DC generator
B. DC motor and AC motor
C. AC motor and DC generator
D. Any one can be used

Explanation

**Step-by-Step Solution:**

1. **Understanding Fleming's Left Hand Rule:**
- Fleming's Left Hand Rule is used to determine the direction of motion in electric motors. It states that if you arrange your thumb, forefinger, and middle finger of your left hand perpendicular to each other, then:
- The thumb represents the direction of motion (force).
- The forefinger represents the direction of the magnetic field (from North to South).
- The middle finger represents the direction of the current (from positive to negative).
- This rule is primarily applied in DC motors.

2. **Understanding Fleming's Right Hand Rule:**
- Fleming's Right Hand Rule is used to determine the direction of induced current when a conductor moves through a magnetic field. It states that if you arrange your thumb, forefinger, and middle finger of your right hand perpendicular to each other, then:
- The thumb represents the direction of motion of the conductor.
- The forefinger represents the direction of the magnetic field.
- The middle finger represents the direction of the induced current.
- This rule is primarily applied in DC generators.

3. **Identifying Applications:**
- From the above explanations, we can conclude:
- Fleming's Left Hand Rule is used in DC motors.
- Fleming's Right Hand Rule is used in DC generators.
- Therefore, the correct option that states the application of these rules is: **DC motor and DC generator.**

4. **Final Answer:**
- The correct answer is: **Option 1: DC motor and DC generator.**

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