The equivalent resistance is more than the largest value of the individual resis

Question

The equivalent resistance is more than the largest value of the individual resistances. B. The equivalent resistance is less than the smallest value of the individual resistances. C. The equivalent resistance is intermediate between the smallest value and largest value of the individual resistances. Two wires made of the same material have the same length but different diameters. They are connected in series to a battery. The quantity that is the same for the wires is: A. the current B. the current density C. the electric field Resistances of 2.0 Ohm, 4.0 Ohm, and 6.0 Ohm and a 24-V emf device are all in series. The circuit is initially ungrounded. After grounding, the current in the circuit: A. increases B. decrease C. does not change Four 20-Ohm resistors are connected in series and the combination is connected to a 20-V emf device. The current in any one of the resistors is: A. 0.25 A B. 1.0 A C. 4.0A D. 100 A Figure shows a multiloop circuit containing one ideal battery and four resistances with the following values: R1 = 20 Ohm, R2 = 20 Ohm, R3 = 30 Ohm, R4 = 8 Ohm, epsilon = 12 V (a) What is the current through the battery? (b) What is the current i2 through R2?

Explanation / Answer

3) does not change

4) in series R = 4*20 = 80 ohm

from ohms law

V = iR

i = V/R

i = 20/80

i = 1/4 = 0.25 A

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