Which of the following shows how to decrease the strength of an electromagnet?Group of answer choicesadd iron center to the coilincrease the number of loops of wire in the coildecrease the number of loops of wire in the coil

The figure shows a simple electromagnet made of a coil of insulated wire wrapped around an iron nail.When the switch closed, which of the following will make this electromagnet stronger? (i) increasing the number of coils(ii) adding more turns to the coil(iii) increasing the direct current flowing through the coil(iv) changing the direct current flowing through the coil to alternating current.*1 point

State which of the following modifications to the design would increase the strength. A Use ac instead of de through the electromagnet B Use a longer, thicker core C Join the two poles of the electromagnet with an iron bar placed across them D Increase the number of turns on the electromagnet

Analyze the factors that affect the strength of an electromagnet.

Alice builds an electric motor by positioning an electromagnet between the poles of a permanent magnet. The electromagnet spins as the current running through it repeatedly switches directions.How could Alice decrease the force that the permanent magnet applies on the electromagnet? A. increase the electric current running through the electromagnet B. decrease the number of turns in the electromagnet's coil C. replace the magnet with a stronger magnet D. decrease the distance between the magnet's poles and the electromagnet

Which action will increase the strength of the magnetic field?Question response areaSelect one optionincreasing the power of the batteryreversing the polarity of the batterymoving the coils further away from the batterystretching out the coils to make the solenoid longer