1. Which of the following statements are true? Check all that apply. a. Kirchhof
ID: 1549056 • Letter: 1
Question
1. Which of the following statements are true? Check all that apply. a. Kirchhoff's junction rule is based on the conservation of b. Kirchhoff's loop rule is based on the conservation of charge c. At any junction point in a circuit, the sum of all the currents entering the junction must equal the sum ofall the currents leaving the junction. d. The sum of the changes in potential around any closed loop of a circuit must equal zero. 2. Consider two copper wires with the same cross-sectional area. Wire A is twice as as do the resistivities and resistances of the two wires compare? Check all that apply. a. Wire B has twice the resistivity of wire A. b. Wire A has twice the resistance of wire B. c. Wire A and wire B have the same resistance. d. Wire B has twice the resistance of wire A. e. Wire A has twice the resistivity of wire B. Wire A and wire B have the same resistivity. 3. In the circuit shown in the figure, four identical resistors labeled A to D are connected to a battery as shown. Si and S2 are switches. Which of the following actions would result in the GREATEST amount of current through resistor A?Explanation / Answer
1) Answer
( c ) and (d) are correct
2) Answer (a) and (b)
Resistance is directly proportional to length
Resistivity is inversly proportional to length
3) Answer is (b), because equivalent of parallel resistance is smaller than in series
4) Answers are (b) (c) (f)
5) Answer is (d)
Since Q=C*V
but capacitance of capacitor is constant
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