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A student fixes a sheet of white paper on a drawing board. He places a bar magnet in the centre of it. He sprinkles some iron filings uniformly around the bar magnet. Then he taps the board gently and observes that the iron filings arrange themselves in particular pattern.
What is SI unit of magnetic field:

A

Pascal

B

`Nm^(2)`

C

Tesla

D

No unit

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To answer the question regarding the SI unit of magnetic field, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Experiment**: - A student places a bar magnet on a sheet of white paper and sprinkles iron filings around it. When the board is tapped, the iron filings align themselves along specific patterns that represent the magnetic field lines around the magnet. 2. **Identifying the Magnetic Field**: - The arrangement of the iron filings indicates the presence of a magnetic field. The pattern formed by the filings shows the direction and strength of the magnetic field produced by the bar magnet. 3. **Defining the SI Unit of Magnetic Field**: - The SI unit of magnetic field is defined as "Tesla" (symbol: T). 4. **Understanding Tesla**: - 1 Tesla is defined as the magnetic field that exerts a force of one Newton on a one-meter length of conductor carrying a current of one Ampere, placed perpendicular to the magnetic field. 5. **Expressing Tesla in Fundamental Units**: - Tesla can also be expressed in terms of other SI units: \[ 1 \, \text{T} = 1 \, \text{N} / (\text{A} \cdot \text{m}) \] - This means that 1 Tesla is equivalent to 1 Newton per Ampere-meter. ### Final Answer: The SI unit of magnetic field is **Tesla (T)**. ---
To answer the question regarding the SI unit of magnetic field, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Experiment**: - A student places a bar magnet on a sheet of white paper and sprinkles iron filings around it. When the board is tapped, the iron filings align themselves along specific patterns that represent the magnetic field lines around the magnet. 2. **Identifying the Magnetic Field**: ...
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