HW1
Q1. (15pt) A 5V charger is connected to a smart phone. The charger can supply 1.5A. The
phone requires 54kJoules to become fully charged. How long does it take for the phone to get
fully charged?
Q2. (15pt) For the electrical circuit below, identify whether device A or B is delivering or
absorbing power for each case:
a) v=1V and i=1A
b) v=3V and i=-10mA
c) v=-100V and i=3.3mA
d) v=-20V and i=-1mA
Q3. (15pt)
Q4. (15pt) Identify the nodes in the following circuit. How many nodes are there in total?
Q5. (15pt)