PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
An ideal 12V d.c. source is connected to a network consisting of resistors R1=4Ω and R2=6Ω in series. This series combination is connected in parallel with a resistor R3=3Ω. A fuse of current rating 0.50A is placed in series with the whole circuit. The resistor R3 is rated for a maximum safe power of 2.0W.
(a) Calculate the equivalent resistance of the entire circuit.
(b) Determine the current supplied by the source.
(c) Compute the power dissipated specifically in R3.
(d) State, with calculations, whether the fuse will blow and whether the power rating of R3 is exceeded.