 # Grade 6: Physical Sciences – Electricity

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Grade 6: Physical Sciences – Electricity
Created by Kshamta Hunter and Marina Milner-Bolotin

Questions 1a: Elements of a Circuit
Which element of a circuit is responsible for turning it on or off? Bulb Battery Switch Resistor Wire CORRECT ANSWER: C (COULD BE ARGUED FOR E)

Questions 1b: Elements of a Circuit
Which element of a circuit is responsible for supplying energy to the circuit? Bulb Battery Switch Resistor Wire CORRECT ANSWER: B

Questions 1c: Elements of a Circuit
Which element of a circuit is responsible for connecting different elements of the circuit (completing it)? Bulb Battery Switch Resistor Wire CORRECT ANSWER: E

Questions 1d: Elements of a Circuit
Which of the following elements converts electrical energy into heat under normal conditions? Bulb Battery Resistor Both A and B Both A and C CORRECT ANSWER: E

Questions 2a: Circuit Diagrams
What does A stand for? Battery Light bulb Wires Switch B A C CORRECT ANSWER: A B D B

Questions 2b: Circuit Diagrams
What does B stand for? Battery Light bulb Wires Switch B A C D CORRECT ANSWER: B B B

Questions 2c: Circuits When the switch is closed, which one of the circuits will have the light on? (ASSUMING ALL CONNECTIONS ARE MADE CORRECTLY) 1 2 3 4 1 only 1 and 2 only 1, 2 and 3 only All of them None of them will turn the light bulb on CORRECT ANSWER: D

Questions 2d: Circuit Diagrams
Which of the circuits below corresponds to the circuit above? Circuit A Circuit B Both circuits None of them B Battery Light bulb Wire A CORRECT ANSWER: A

Questions 3a: Series and Parallel Circuits
Which of these circuits is a series circuit and which one is a parallel circuit? A – series; B - parallel A- parallel; B - series C. Both are series D. Both are parallel E. Depends on the battery Battery Light bulb Wire A B CORRECT ANSWER: A

Question 3b: Series Circuits
Two identical light bulbs are connected in a series circuit as shown in the diagram. How will the bulbs’ brightness compare to each other? A B Bulb A will be brighter than bulb B Bulb B will be brighter than bulb A The bulbs will be equally bright Bulb A will be lit and bulb B won’t Bulb B will be lit and bulb A won’t CORRECT ANSWER: C

Question 3c: Parallel Circuits
Two identical light bulbs are connected in a parallel circuit as shown in the diagram. How will the bulbs’ brightness compare to each other? A B Bulb A will be brighter than bulb B Bulb B will be brighter than bulb A The bulbs will be equally bright Bulb A will be lit and bulb B won’t Bulb B will be lit and bulb A won’t CORRECT ANSWER: C

Question 3d: Series and Parallel Circuits
Two identical light bulbs are connected first in a series circuit and then in a parallel circuit as shown in the diagrams. In which circuit will the bulbs be brighter? A B The bulbs will be brighter in series circuit. The bulbs will be brighter in parallel circuit. The bulbs will be equally bright in series and parallel circuits. CORRECT ANSWER: B A B

Question 4a: Electron Flow through a Circuit
In the following circuit, 100 electrons flow out of the battery towards light bulb A. How many electrons will enter light bulb A? HOW CAN YOU IMPROVE THIS QUESTION? WHY? Exactly 100 Electrons About 90 Electrons About 75 Electrons About 25 Electrons No Electrons A B CORRECT ANSWER: A

Question 4b: Electron Flow through a Circuit
In the following circuit electrons flow out of the battery towards light bulb B. Then they flow towards light bulb A. Which bulb will have more electrons flowing through it? Bulb A Bulb B Same Impossible to determine A B CORRECT ANSWER: C

Question 5a: Brightness of a light bulb
What determines the brightness of a light bulb? Voltage across it Current through it Its Resistance All of the above CORRECT ANSWER: D

Question 5b: Brightness of a light bulb
What would you do if you wanted to increase the rate at which electrons (the blue dots) are flowing from the battery to the light bulb? Increase Resistance and decreases Voltage Increase Resistance and increase Voltage Decrease Resistance and increase Voltage Decrease Resistance and decrease Voltage CORRECT ANSWER: C

Question 5c: Current What is electric current?
It is the measure of the brightness of a light bulb It is the strength of a battery or the power supply It is the number of electrons that flow from a battery It is the number of electron flowing at a given time from a battery All of the above CORRECT ANSWER: D