1)Which of these statements articulate one of Kirchhoff\'s laws? (Select all tha

Question

1)Which of these statements articulate one of Kirchhoff's laws? (Select all that apply)

A) The voltage into a junction equals to voltage out of the junction
B) The sum of all currents around a loop is zero
C) The voltage drop across all elements in a circuit is the same
D) The current weakens as you move through each circuit element
E) The sum of all voltage drops around a loop is zero
F) The total current into a junction equals the total current out of the junction

2.)In figure 23.22, if you measured the voltage across each resistor (58 Ohm, 70 Ohm, 42 Ohm), across which resistor would you measure the largest Voltage?

A) All 3 would read the same
B) 70 Ohms
C) Cannot determine
D) 42 Ohms
E) 58 Ohms

3.)Two identical resistors have different currents through them: Resistor A has twice the current through it as does Resistor B. What can we say about the power dissipated in each of them?

A) Half as much power dissipated in A as in B
B) Four times as much power dissipated in A as in B
C) They both dissipate the same amount of power
D) Twice as much power dissipated in A as in B
E) One-fourth as much power dissipated in A as in B

4.) Most devices are connected in:

A) parallel, so one going out doesn't affect the others
B) series, so one going out doesn't affect the others
C) series, since it reduces the equivalent resistance of the devices
D) parallel, since it reduces the equivalent resistance of the devices

Explanation / Answer

(2)image is missing for this problem

(3)Pb= i2R

Pa= (2i)2R= 4 i2R

so Pa= 4 Pb

so Four times as much power is dissipated in A as in B. so option (b) is correct.

(4) Most devices are connected in parallel, so that one going out doesn't affect the others. so option (A) is correct.

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