Exam Primer

# 5.5 Series and Parallel Resistors

## Practice

B-005-05-01
In a parallel circuit with a voltage source and several branch resistors, how is the total current related to the current in the branch resistors?
It equals the sum of the branch current through each resistor
It equals the average of the branch current through each resistor
It decreases as more parallel resistors are added to the circuit
It is the sum of each resistor's voltage drop multiplied by the total number ofresistors

B-005-05-02
A 6 volt battery is connected across three resistances of connected in parallel.
The current through the 10 ohms, 15 ohms and 20 ohms separate resistances, when added together, equals the total current drawn from the battery
The current flowing through the 10 ohm resistance is less than that flowing through the 20 ohm resistance
The voltage drop across each resistance added together equals 6 volts
The voltage drop across the 20 ohm resistance is greater than the voltage across the 10 ohm resistance

B-005-05-03
Total resistance in a parallel circuit:
is always less than the smallest resistance
depends upon the IR drop across each branch
could be equal to the resistance of one branch
depends upon the applied voltage

B-005-05-04
Two resistors are connected in paralle and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is:
80 milliamperes
40 milliamperes
80 amperes
40 amperes

B-005-05-05
The total resistance of resistors connected in series is:
greater than the resistance of any one resistor
less than the resistance of any one resistor
equal to the highest resistance present
equal to the lowest resistance present

B-005-05-06
Five 10 ohm resistors connected in series equals:
50 ohms
5 ohms
10 ohms
1 ohm

B-005-05-07
Which series combination of resistors would replace a single 120 ohm resistor?
six 22 ohm
two 62 ohm
five 100 ohm
five 24 ohm

B-005-05-08
If ten resistors of equal value were wired in parallel, the total resistance would be:
10 / R
R / 10
10 x R
10 + R

B-005-05-09
The total resistance of four 68 ohm resistors wired in parallel is:
12 ohms
34 ohms
272 ohms
17 ohms

B-005-05-10
Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that:
the voltage across B is twice that across A
the voltage across A is twice that across B
A has half the resistance of B
B has half the resistance of A

B-005-05-11
The total current in a parallel circuit is equal to the:
source voltage divided by the value of one of the resistive elements
sum of the currents through all the parallel branches
source voltage divided by the sum of the resistive elements
current in any one of the parallel branches