An unknown resistor is connected between the terminals of a 3.00 V battery. Energy is dissipated in the resistor at the rate of 0.745 W. The same resistor is then connected between the terminals of a 1.50 V battery. At what rate is energy now dissipated?

P = 0.186W

Explanation: Energy dissipated in this question is tantamount to power.

P = IV

But V = IR

Since the resistor is the same, we can use it in the second solution in the second connection to get power.

Please find the attached file for the solution

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

iron would move it is magnetic there is a mag field around the current in the wire