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Question-1. What is magnetic field of electric current?
Answer-1: When current flows through a wire magnetic field is produced around it.
Question-2. Where does the field become maximum when current flows through the circular coil?
Answer-2: At the centre of the circular coil the field is maximum.
Question-3. What happens to the magnetic field if you go away from the centre of the coil?
Answer-3: Field decreases on either side of the coil.
Question-4. What is tangent law?
Answer-4: When a magnetic needle is placed between two mutually perpendicular uniform magnetic fields. Needle is deflected making an angle θ with the deflecting field.
B = BH tanθ
Question-5. Why do you set the plane of the coil in the direction of BH?
Answer-5: To satisfy tangent law.
Question-6. What are the initial adjustment in the experiment?
A) Plane of the coil must be set parallel to BH
B) Aluminium pointer should read 0-0
Question-7. Why do you take two deflections θ1 and θ2?
Answer-7: To eliminate eccentric error i.e. centre of the magnetic needle may not be exactly at the centre of the circular degree scale.
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