grade 6: physical sciences – electricity created by kshamta hunter and marina milner-bolotin...
TRANSCRIPT
Grade 6: Physical Sciences – Electricity
Created by Kshamta Hunter and Marina Milner-BolotinEmail: [email protected] [email protected]
Questions 1a: Elements of a Circuit
Which element of a circuit is responsible for turning it on or off?
A. Bulb
B. Battery
C. Switch
D. Resistor
E. Wire
Questions 1b: Elements of a Circuit
Which element of a circuit is responsible for supplying energy to the circuit?
A. Bulb
B. Battery
C. Switch
D. Resistor
E. Wire
Questions 1c: Elements of a Circuit
Which element of a circuit is responsible for connecting different elements of the circuit (completing it)?
A. Bulb
B. Battery
C. Switch
D. Resistor
E. Wire
Questions 1d: Elements of a Circuit
Which of the following elements converts
electrical energy into heat under normal conditions?
A. Bulb
B. Battery
C. Resistor
D. Both A and B
E. Both A and C
Questions 2a: Circuit Diagrams What does A stand for?
A. Battery
B. Light bulb
C. Wires
D. Switch
B C
BD
A
B
Questions 2b: Circuit Diagrams What does B stand for?
A. Battery
B. Light bulb
C. Wires
D. Switch
BC
BD
A
B
Questions 2c: CircuitsWhen the switch is closed, which one of the circuits will have the light on? (ASSUMING ALL CONNECTIONS ARE MADE CORRECTLY)
A. 1 only
B. 1 and 2 only
C. 1, 2 and 3 only
D. All of them
E. None of them will turn the light bulb on
1 2 3 4
Questions 2d: Circuit Diagrams Which of the circuits
below corresponds to the circuit above?
A. Circuit A
B. Circuit B
C. Both circuits
D. None of them B
Battery
Light bulb
Wire
A
Questions 3a: Series and Parallel Circuits
Which of these circuits is a series circuit and which one is a parallel circuit?
A. A – series; B - parallel
B. A- parallel; B - series
C. Both are series
D. Both are parallel
E. Depends on the battery
A
B
Battery
Light bulb
Wire
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. Bulb A will be brighter than bulb B
B. Bulb B will be brighter than bulb A
C.The bulbs will be equally bright
D.Bulb A will be lit and bulb B won’t
E. Bulb B will be lit and bulb A won’t
A B
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. Bulb A will be brighter than bulb B
B. Bulb B will be brighter than bulb A
C.The bulbs will be equally bright
D.Bulb A will be lit and bulb B won’t
E. Bulb B will be lit and bulb A won’t
A B
Question 3d: Series and Parallel CircuitsTwo 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. The bulbs will be brighter in series
circuit.
B. The bulbs will be brighter in parallel
circuit.
C.The bulbs will be equally bright in
series and parallel circuits.A 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?
A. Exactly 100 Electrons
B. About 90 Electrons
C.About 75 Electrons
D.About 25 Electrons
E. No Electrons
A B
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?
A. Bulb A
B. Bulb B
C.Same
D. Impossible to determine
A B
Question 5a: Brightness of a light bulb
What determines the brightness of a light
bulb?
A. Voltage across it
B. Current through it
C. Its Resistance
D. All of the above
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?
A. Increase Resistance and decreases Voltage
B. Increase Resistance and increase Voltage
C. Decrease Resistance and increase Voltage
D. Decrease Resistance and decrease Voltage
Question 5c: Current
What is electric current?
A. It is the measure of the brightness of a light bulb
B. It is the strength of a battery or the power supply
C. It is the number of electrons that flow from a battery
D. It is the number of electron flowing at a given time from a battery
E. All of the above