In resistance welding, a pair of electrodes presses two sheets of metal together. Heat from the passege of current melts the metal sheets where they are in contact between the electrodes to form a weld. What potential difference is needed to produce a current of 10kA when the resistance of the metal between the electrodes is 0.20milli ohms?

current= V/R

V= R*I= 0.20*10k=2009volts
check my thinking.

V = I * R = 10*10^3 * 0.2*10^-3 = 2.0 Volts.

To determine the potential difference needed to produce a current of 10kA (10,000 Amperes) when the resistance of the metal between the electrodes is 0.20 milliohms (0.20 x 10^-3 Ohms), we can use Ohm's Law.

Ohm's Law states that the potential difference (V) across a conductor is equal to the current (I) flowing through it multiplied by the resistance (R) of the conductor. Mathematically, this can be expressed as V = I * R.

In this case, we are given the current (I) as 10,000 Amperes and the resistance (R) as 0.20 milliohms (0.20 x 10^-3 Ohms). Plugging these values into the equation, we get:

V = 10,000 A * 0.20 x 10^-3 Ω
V = 2 Volts

Therefore, a potential difference of 2 Volts is needed to produce a current of 10kA when the resistance of the metal between the electrodes is 0.20 milliohms.