Four identical wires, each of diameter d and length L are connected in parallel. The combination has the same resistance as a single wire of length L but whose diameter is 2d 4d d/2 d/4

2.00 N 10.00V00 a ww In the circuit shown in the figure, find a) the current flowing through points a and b and through the 10N resistor and b) the potential difference Vab of point a relative to point b. 1.00 N 5.00 V 4.00 N 10.00 N

The resistivity of axoplasm in a squid axon is 0.30 Ω · m. What is the length of a squid axon having a resistance of 2.2 × 105 Ω and a radius of 0.020 cm? (An axon, which is a long projection of a neuron cell, carries nerve impulses)

None of the resistors in the circuit shown in the drawing is connected in series or in parallel with one another. Find (a) the current Is and the resistances (b) R2 and (c) R3. R = 4.0 2 9.0 A 75.0 V R2 12.0 A R3 6.0 A R4 - 2.0 2 I5 R5 = 2.2 a (a) Number i Units (b) Number i Units (c) Number i Units eTextbook and Media > > >

Two resistances, R1 and R2, are connected in series across a 12-V battery. The current increases by 0.23 A when R2 is removed, leaving R1 connected across the battery. However, the current increases by just 0.13 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.