To calculate the total amount of heat given off by a constant current, you can use the equation:
Q = I * t * V
Where: Q is the total amount of heat (in joules), I is the current (in amperes), t is the time (in seconds), and V is the voltage (in volts).
This equation is derived from the relationship between electrical power (P), current (I), voltage (V), and time (t), which is given by:
P = I * V
Since power is the rate of energy transfer, the total amount of heat (Q) is obtained by multiplying the power by the time (P * t), resulting in the equation Q = I * t * V.