40 ohms 1.2 A
40 ohms
12 V

Calculate the total energy developed in 5
minutes by the system above.​

17280 J and 1080 J

Explanation:

Given :

R= 40 ohm

I=1.2A

t= 5 min=60×5=300 sec

Now,

Total energy can be calculated as:

Now,

V=12V

R=40 Ohm

Total energy  is 17280 J and 1080 J

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.