ELECTRIC CIRCUITS CERTIFICATION
EVALUATION COMPLETE QUESTIONS AND
SOLUTIONS GRADED APLUS
●● 2. The current (measured in Amperes) in a circuit is
A. the amount of charge (measured in Coulombs) that passes a point (in
the circuit) in 1 second.
B. the amount of the total energy carried by 1 Coulomb of charge.
C. the total number of electrons in the circuit.
D. never lethal if the current is due to positive charges.
Answer: A. the amount of charge (measured in Coulombs) that passes a
point (in the circuit) in 1 second.
●● 3. The resistance of a circuit element is a measure of
A. the total energy of the charges in the circuit element.
B. the amount of work that an electron can perform.
C. the ratio of the voltage difference between element ends to the current
in the element.
D. the size of the circuit.
Answer: C. the ratio of the voltage difference between element ends to
the current in the element.
,●● 4. A certain kind of light bulb carries 0.5 amperes of current when
connected to a 120 Volt AC circuit. What is
its power rating?
A. 60 W
B. 75 W
C. 100 W
D. 240 W
Answer: A. 60 W
●● 5. The resistance of a 25 watt bulb is ______that of a 100 watt bulb,
if both run on the same voltage.
A. one half
B. one fourth
C. four times
D. double
Answer: C. four times
●● 6. Two light bulbs are installed in two sockets connected in parallel
and power is then applied to the
combination so that both bulbs light. If one of the bulbs is then removed
from its socket, the other one will
A. get brighter.
B. remain equally bright.
, C. get dimmer.
D. go out.
Answer: B. remain equally bright.
●● 7. What is the best way to ensure that a 40 watt bulb and a 60 watt
bulb have the same voltage applied to
them?
A. Connect the bulbs in series with the power supply ( ) like this:
B. Connect the bulbs in parallel with the power supply like this:
C. Separately connect the bulbs to two power supplies rated at the same
voltage:
D. Can't be done: different wattage bulbs must always have different
voltages.
Answer: B.
●● 8. A 40 W bulb and a 60 W bulb are connected in series with a 120 V
power source. Which of the following is
true for this arrangement?
A. The 40 W bulb is brighter than the 60 W bulb.
B. The 60 W bulb is brighter than the 40 W bulb.
C. The 60 W bulb is brighter than it would be if the 40 W bulb were
replaced by a wire.
D. The 40 W bulb is brighter than it would be if the 60 W bulb were
replaced by a wire.
EVALUATION COMPLETE QUESTIONS AND
SOLUTIONS GRADED APLUS
●● 2. The current (measured in Amperes) in a circuit is
A. the amount of charge (measured in Coulombs) that passes a point (in
the circuit) in 1 second.
B. the amount of the total energy carried by 1 Coulomb of charge.
C. the total number of electrons in the circuit.
D. never lethal if the current is due to positive charges.
Answer: A. the amount of charge (measured in Coulombs) that passes a
point (in the circuit) in 1 second.
●● 3. The resistance of a circuit element is a measure of
A. the total energy of the charges in the circuit element.
B. the amount of work that an electron can perform.
C. the ratio of the voltage difference between element ends to the current
in the element.
D. the size of the circuit.
Answer: C. the ratio of the voltage difference between element ends to
the current in the element.
,●● 4. A certain kind of light bulb carries 0.5 amperes of current when
connected to a 120 Volt AC circuit. What is
its power rating?
A. 60 W
B. 75 W
C. 100 W
D. 240 W
Answer: A. 60 W
●● 5. The resistance of a 25 watt bulb is ______that of a 100 watt bulb,
if both run on the same voltage.
A. one half
B. one fourth
C. four times
D. double
Answer: C. four times
●● 6. Two light bulbs are installed in two sockets connected in parallel
and power is then applied to the
combination so that both bulbs light. If one of the bulbs is then removed
from its socket, the other one will
A. get brighter.
B. remain equally bright.
, C. get dimmer.
D. go out.
Answer: B. remain equally bright.
●● 7. What is the best way to ensure that a 40 watt bulb and a 60 watt
bulb have the same voltage applied to
them?
A. Connect the bulbs in series with the power supply ( ) like this:
B. Connect the bulbs in parallel with the power supply like this:
C. Separately connect the bulbs to two power supplies rated at the same
voltage:
D. Can't be done: different wattage bulbs must always have different
voltages.
Answer: B.
●● 8. A 40 W bulb and a 60 W bulb are connected in series with a 120 V
power source. Which of the following is
true for this arrangement?
A. The 40 W bulb is brighter than the 60 W bulb.
B. The 60 W bulb is brighter than the 40 W bulb.
C. The 60 W bulb is brighter than it would be if the 40 W bulb were
replaced by a wire.
D. The 40 W bulb is brighter than it would be if the 60 W bulb were
replaced by a wire.
