This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Step 1: Complete Question 3(b)(i). (b) (i) An electromagnet* is a temporary magnet created when an electric current flows through a coil of wire, typically wrapped around a soft iron core. Step 2: Answer Question 3(b)(ii). (ii)* Two ways to increase the strength of an electromagnet are: Increase the number of turns* in the coil of wire. Increase the current* flowing through the coil. Step 3: Answer Question 3(c). (c) Two uses of an electromagnet are: They are used in electric bells* to strike the gong. They are used in cranes* to lift and move heavy magnetic materials like scrap iron. Step 4: Answer Question 3(d). (d) Two differences between an electromagnet and a permanent magnet are: An electromagnet is a temporary magnet whose magnetism can be turned on and off, while a permanent magnet* retains its magnetism indefinitely. The strength of an electromagnet can be varied by changing the current or number of turns, whereas the strength of a permanent magnet* is fixed. Last free one today — make it count tomorrow, or type /upgrade for unlimited.