Question

In a circuit with a coil of resistance 2 ohms, the magnetic flux changes from 2.0 Wb to 10.0 Wb in 0.2 second. The charge that flows in the coil during this time is

• A. 5.0 coulomb
• B. 4.0 coulomb
• C. 1.0 coulomb
• D. 0.8 coulomb

Answer 1

Answer: (B)

4.0 coulomb

Answer 2

$\Delta Q = \frac { \Delta \phi } { R } = \frac { ( 10 - 2 ) } { 2 } = 4 C$