Just as in the case of r-c circuits, the steady state here is never actually reached: the exponential functions approach their limits asymptotically as t→[infinity] . however, it usually does not take very long for the value of i to get very close to its presumed limiting value. the next several questions illustrate this point. note that the quantity l/r has dimensions of time and is called the time constant (you may recall similar terminology applied to r-c circuits). the time constant is often denoted by τ . using τ , one can write the expressioni(t)=er(1−e−rt/l)asi(t)=e r(1−e−t/τ) .find the ratio of the current i(t) at time t=6τ to the maximum current imax=er .express your answer numerically, using three significant figures.