Question 90
Arun makes an electromagnet using:
- one 1.5 V cell
- an iron nail 15 cm in length
- 10 turns of wire around the nail.
Arun uses an ammeter to measure the current in the electromagnet circuit. He then varies the current. For each current, Arun measures the number of paperclips that the electromagnet will hold.
State the independent variable in this investigation.
- one 1.5 V cell
- an iron nail 15 cm in length
- 10 turns of wire around the nail.
Arun uses an ammeter to measure the current in the electromagnet circuit. He then varies the current. For each current, Arun measures the number of paperclips that the electromagnet will hold.
State the independent variable in this investigation.
