The current in a resistor is given by I(t)=4.0tA for the time interval 0≤t≤2.5s, where t is in seconds. The resistance of the resistor is 6Ω and its temperature remains constant.
(a) Write an expression for the instantaneous potential difference across the resistor as a function of time.
(b) Find the potential difference at t=2.0s.
(c) Calculate the instantaneous electrical power being dissipated at t=2.0s.