1) Which of the following statements is true about DC circuits: Multiple choice

A The sum of currents into a junction is equal to the sum of currents leaving a junction.

B None of the other statements are true.

C The sum of voltages entering a junction in equal to the sum of voltages leaving a junction.

D The sum of currents around a closed loop must be zero.

2) For a resistor in a DC circuit which of the following formulas is correct for the power dissipated by the resistor?

 

3) For resistors in parallel which of the following statements is true?

a The current through each resistor in a parallel circuit must be the same.

b The voltage across each resistor in a parallel circuit is the same.

c None of the other statements are true

d The total resistance of the resistors in parallel is always larger that the smallest of the parallel resistors.

ap = I R2 V b P= - cP= IR v2 d p= R