Chapter 8: DC Circuits
MULTIPLE CHOICE
1. The formula for total current in a series circuit is ____.
a.
IT = IR1 = IR2 = IR3 …= IRn
c.
1/ IT = 1/IR1 + 1/IR2 + 1/IR3 …+ 1/IRn
b.
IT = IR1 + IR2 + IR3 …+ IRn
d.
IT = IR1 – IR2 – IR3 …- IRn
2. The formula for total resistance in a series circuit is ____.
a.
RT = R1 = R2 = R3 … = Rn
c.
1/ RT = 1/R1 + 1/R2 + 1/R3 …+ 1/Rn
b.
RT = R1 + R2 + R3 …+ Rn
d.
RT = R1 – R2 – R3 … – Rn
3. The formula for total voltage in a series circuit is ____.
a.
ET = ER1 = ER2 = ER3 … = ERn
c.
1/ET = 1/ER1 + 1/ER2 + 1/ER3 … + 1/ERn
b.
ET = ER1 + ER2 + ER3 … + ERn
d.
ET = ER1 – ER2 – ER3 … – ERn
4. Voltage dividers are essentially ____ circuits with ____ loads.
a.
series; parallel
c.
series-parallel; parallel
b.
parallel; series
d.
series-parallel; series
5. In solving for all values in a circuit, the total ____ must be found first.
a.
power
c.
current
b.
voltage
d.
resistance
6. The formula for total current in a parallel circuit is ____.
a.
IT = IR1 = IR2 = IR3 …= IRn
c.
1/ IT = 1/IR1 + 1/IR2 + 1/IR3 …+ 1/IRn
b.
IT = IR1 + IR2 + IR3 …+ IRn
d.
IT = IR1 – IR2 – IR3 …- IRn
7. The formula for total resistance in a parallel circuit is ____.
a.
RT = R1 = R2 = R3 … = Rn
c.
1/ RT = 1/R1 + 1/R2 + 1/R3 …+ 1/Rn
b.
RT = R1 + R2 + R3 …+ Rn
d.
RT = R1 – R2 – R3 … – Rn
8. The formula for total voltage in a parallel circuit is ____.
a.
ET = ER1 = ER2 = ER3 … = ERn
c.
1/ET = 1/ER1 + 1/ER2 + 1/ER3 … + 1/ERn
b.
ET = ER1 + ER2 + ER3 … + ERn
d.
ET = ER1 – ER2 – ER3 … – ERn
9. The current through each branch of a parallel circuit is ____ the amount of resistance of the branch.
a.
twice
c.
directly proportional to
b.
half
d.
inversely proportional to
10. A Wheatstone bridge is used to measure an unknown ____.
a.
electrical power
c.
electrical current
b.
electrical voltage
d.
electrical resistance
COMPLETION
1. A(n) ____________________ is used to convert a higher voltage to a lower one so that an instrument
can read or measure a voltage above its normal range.
2. Voltage dividers are often used to set a(n) ____________________ or operating point of various
active electronic components such as transistors or integrated circuits.
3. The ____________________ consists essentially of two voltage dividers.
SHORT ANSWER
1. Elaborate on the two parts of Ohm’s law.
2. What are some present-day applications of Wheatstone bridge circuits?
