Question

The current, I, in amperes for a circuit at time, t, for seconds is given by 1=40cos[60pi( t+1/120)] .

Find the maximum current.

Answer 1

The maximum current is 40 Amperes

Explanation:

The function describes alternating current following a cos function with amplitude of 40A. The cosine will attain its maximum when its argument reaches 0 and every 2pi period. The maximum value of the cos() function is 1. Therefore the maximum of the function describing the current will be 40*1=40 Amperes.