Magnetic Field Due to a Circular Arc at the Centre
Two circular ...
Question
Two circular coils of wires made of wire of same gauge have the same number of turns and have radii 20 cm and 40 cm. They are connected in parallel to a battery. The ratio of the magnetic inductions at the centers of the coils is:
A
1 : 2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2 : 1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
1 : 4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
4 : 1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D 4 : 1 Resistanceα l ∴R1=R & R2=2R Current in coil 1=VR=i Current in coil 2=V2R=i2 B1=μ0i2R=μ0i2R B2=μ0i24R=μ0i8R B1:B2=4:1