Circuits Lab - Pre Assessment

What do you know about completing a simple circuit? What impact does removing one of the metal jumpers have on the brightness of the bulb?

• It gets brighter.

• It flickers.

• It stops emitting light.

• It becomes dimmer.

In an experiment with different resistances in a circuit, you observe the compass needle deflection. What can you infer about the relationship between resistance and the deflection of the compass needle, and how does this relationship relate to the current flowing through the circuit?

• An increase in resistance causes the compass needle to deflect more, indicating a higher current flow.

• A decrease in resistance leads to a greater deflection of the compass needle, suggesting an increase in current flow.

• Changes in resistance do not affect the compass needle deflection, indicating a constant current flow.

• The compass needle deflection is directly related to the amount of power being consumed in the circuit.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

In the lesson, you explored the concept of short circuits. Which of the following best describes how a short circuit affects a circuit’s load, which was the light bulb in our circuit?

• A short circuit increases the current through the load, causing the circuit to work more efficiently.

• A short circuit diverts current away from the load, resulting in lower current flow through the load.

• A short circuit has no effect on the load, maintaining the same current flow.

• A short circuit stabilizes the circuit, ensuring the proper flow of current through the load.

Tags

NGSS.MS-PS3-5

How would you determine the total voltage output in a circuit with two batteries connected in series?

• It is equal to the voltage of one battery.

• It is equal to the voltage of one battery plus the resistance of the other.

• It is the sum of the voltages of the two batteries.

• It is the average voltage of the two batteries.

In a circuit containing two batteries connected in parallel, how does the total voltage of the circuit compare to the voltage of a circuit with just one battery?

• The total voltage is half of a one-battery circuit.

• The total voltage remains the same as the individual batteries.

• The total voltage of the circuit is the sum of the individual batteries.

• The total voltage becomes unstable when compared to a single battery.

Use this scenario to answer the next few questions:

You are working as an engineer designing an emergency power supply system for a small hospital in a rural area. The hospital requires reliable power for essential equipment such as life support machines and refrigeration units. Due to budget constraints, you have two types of batteries available: one set can be wired in series to provide high voltage but depletes fast, and another set can be wired in parallel to last longer but offer lower voltage.

 

Given the hospital's needs, you must decide which battery configuration will be most suitable for providing a stable power supply in the event of a power outage. Based on the data provided below, consider the advantages and disadvantages of each battery configuration.

 

Hospital Equipment Requirements:

 

Life support machines: Require a consistent power source with a high voltage for short periods of time.

Refrigeration units: Need a steady power source that will maintain cold storage over a longer period of time.

Battery Configurations:

Series:                  Voltage: High (2 x 1.5V batteries = 3V)

                                Short Run Time (depletes quickly)

Parallel:               Voltage: Low (1.5V)

                                Longer Run Time (depletes slowly)

• I have read the scenario.

• I have NOT read the scenario.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Which battery configuration would be most suitable for powering life support machines at the hospital?

• 1. A, because it provides higher voltage required for life support machines to function.

• B, because it provides steady voltage for a longer period of time.

• A, because it provides a higher voltage for a longer duration.

• B, because it provides consistent lower voltage.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which battery configuration would be most suitable for powering refrigeration units at the hospital?

• A, because it provides higher voltage required for life support machines to function.

• B, because it provides steady voltage for a longer period of time.

• A, because it provides higher voltage for a longer duration.

• B, because it provides consistent lower voltage.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Given the hospital's conflicting needs for emergency power (higher voltage, low duration for life support machines and lower voltage, higher duration for refrigeration units), how should the emergency power supply system be designed to accommodate these requirements?

• Use wiring in series to power both life support machines and refrigeration units.

• Use wiring in parallel to power both life support machines and refrigeration units.

• Use separate circuits for each type of equipment, wiring batteries in series for life support machines and in parallel for refrigeration units.

• Use a combination of series and parallel wiring in one circuit to power both life support machines and refrigeration units.

Tags

NGSS.HS-ETS1-2

NGSS.HS-ETS1-3

What is the effect of increasing the resistance in a circuit on the current flow, assuming the voltage remains constant?

• The current flow increases.

• The current flow decreases.

• The current flow remains unchanged.

• The current flow becomes unstable.