A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, the current will
A. increase
B. decrease
C. remain same
D. first increase then decrease
Answer:A
A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, the current will
A. increase B. decrease C. remain same D. first increase then decrease