Following are the steps ro magenetize a steel bar. Arrange them in a sequential order.
(A) The end at which current enters in an anticlockwise direction will become the north pole and the other end becomes the south pole.
(B) Keep the steel bar to the magnetized inside a long coil of insulated copper wire.
(C) Pass a strong direct current through the coil for sometime.
(D) The specimen of steel bar will get magnetized.

Options

A. CBDA
B. BDCA
C. BADC
D. BCDA

Explanation

To arrange the steps for magnetizing a steel bar in sequential order, we will analyze each step carefully:

1. **Step B**: "Keep the steel bar to the magnetized inside a long coil of insulated copper wire."
- This is the first step because we need to place the steel bar inside the coil before we can apply any current to magnetize it.

2. **Step C**: "Pass a strong direct current through the coil for some time."
- After placing the steel bar inside the coil, the next step is to pass a strong direct current through the coil. This current will create a magnetic field around the coil, which is essential for magnetizing the steel bar.

3. **Step D**: "The specimen of the steel bar will get magnetized."
- Once the current is passed through the coil, the steel bar will become magnetized due to the magnetic field created by the current.

4. **Step A**: "The end at which current enters in an anticlockwise direction will become the north pole and the other end becomes the south pole."
- Finally, after the steel bar is magnetized, we can determine the polarity of the ends of the bar based on the direction of the current flow.

Putting it all together, the correct sequential order is:
- B → C → D → A