Zayra runs electric current through 38 coils of wire in a series circuit and measures a magnetic field strength of 79.3 µT around the coils. She then inserts a ferromagnetic core inside the coils to create an electromagnet and measures the magnetic field strength again. Which of the following answers would be a correct measurement

I DONT KNOW THE ANSWER TO THIS QUESTION

step-by-step explanation:

we are given

we have to simplify it

firstly, we will factor it

now, we can cancel like terms

now, we can combine it

so, we get

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.