Given:
The number of the coils, N=20
The cross-sectional area of the solenoid, A=4.0×10⁻⁴ m²
The magnetic fields, B₁=0.0500 T
and B₂=0.180 T
The time interval, t=1.90 s
The resistance of the resistor, R=1.90 s
To find:
1. The magnitude of the induced emf.
2. The current flowing through the resistor.
Explanation:
1.
The magnitude of the induced emf in the solenoid is given by,
On substituting the known values,
2.
From Ohm's law, The induced emf is given by,
On substituting the known values,
Final answer:
1. The induced emf is 0.55 mV
2. The current through the given resistor is 0.11 mA