How much current is drawn by a television with a resistance of 30 ω that is connected across a potential difference of 120v?

By using the Ohms law, we can calculate the current.

Ohms law,

Here, V is potential difference, and R is the resistance.

Given,   and .

Therefore, putting the given values in above relation , we get

or          

Thus, the current is drawn by a television 4 Ampere

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.