1. The problem statement, all variables and given/known data A student is designing an alarm circuit. She wants a time interval between closing a switch and the circuit becoming active. She decides to charge a 2200 mu (x10 -6) F capacitor through a resistor from a 5V supply. The potential difference across the cap. must rise to 4.3 V for the alarm to become active. Calculate the size of the resistor that she should connect in the circuit to acheive a 1 minute delay 2. Relevant equations V=V(initial)e^-t/RC 3. The attempt at a solution t should be 60 seconds ln(4.3/5)=-60/Rx2200x10-6 RC=719.5831403 R should be .. Oh .. That's too big.. I NEED HELP!