Static electricity
Which tiny particles move from one object to another when objects become electrically charged?
A. Protons
B. Neutrons
C. Electrons
D. Atoms
C. Electrons
What is the unit of electric current?
A. Volt (V)
B. Ohm (Ω)
C. Ampere (A)
D. Watt (W)
C. Ampere (A)
In which type of circuit are components connected on separate branches?
A. Series circuit
B. Parallel circuit
C. Open circuit
D. Short circuit
Parallel circuit
Name the device that measures voltage.
Voltmeter
A farmer has 17 sheep. All but 9 run away. How many are left?
9 stayed behind
What charge is an electron?
Negative
What does voltage measure?
A. How much electrical potential difference exists between two points
B. How much chemical energy a batteryhas
C. How quickly it can push the electrons in the wire
D. How quickly current can travel through the resistor
A. How much electrical potential difference exists between two points
Two identical resistors are connected in series to a 12 V battery.
Assuming ideal components, what is the voltage across each resistor?
6V
How must an ammeter be connected to measure the current flowing through a light bulb?
A. In parallel
B. In series
C. Across the battery only
D. Outside the circuit
B. In series
What is the smallest prime number?
2
What happens when two negatively charged objects are brought close together?
They repel each other
What are the 3 components of a simple circuit?
Battery
Resistor (light bulb)
Wires
A student removes one bulb from a circuit containing two bulbs. The other bulb immediately goes out.
What type of circuit are the bulbs most likely connected in?
Series
How must a voltmeter be connected to measure the voltage across a light bulb?
A. In series with the bulb
B. In parallel across the bulb
C. In series with the battery only
D. It does not need to be connected to the circuit
B. In parallel across the bulb
How many players from one basketball team are on court at once?
5
A student rubs a balloon against their hair. The balloon becomes negatively charged.
Explain / draw how the balloon became negatively charged.
The balloon gained electrons from the hair and becomes negatively charged.
What happens if there is no resistor / light bulb connected to the battery and wires?
Short circuit
A student adds a second identical bulb in parallel to a circuit containing one bulb and a battery.
What generally happens to the brightness of the bulbs?
A. Both become brighter.
B. Both become dimmer.
C. The first bulb becomes brighter, and the second stays off.
D. Both remain equally bright as before.
D. Both remain equally bright as before.
A 9 V battery is connected to three identical bulbs in series. Assuming ideal components, what voltage is across each bulb?
What is the largest organ of the human body?
Skin
A negatively charged balloon attracts small pieces of neutrally charged paper.
Explain / draw how the balloon can attract the paper even though the paper is neutral.
Negatively charged balloon brought close to the paper
Charges shift/rearrange in the paper so that the side closest to the balloon becomes positively charged and becomes attracted to the balloon
A light bulb is connected to a battery, but the switch is open.
Will the bulb light? Explain why or why not.
No
Because the circuit is broken and no current can pass through the bulb
DOUBLE POINTS
Draw a labelled parallel circuit with the following elements (need to use correct circuit symbols):
- A 8V battery
- 3A current measured from the start of the circuit
- 3 parallel branches with 2 light bulbs on each branch
Your diagram should show the current measured in each branch & the voltage measured in each light bulb.
See answer on board
Which of the following statements about voltage, current and resistance is correct?
A. When voltage increases and resistance stays the same, current decreases.
B. When resistance increases and voltage stays the same, current increases.
C. When voltage increases and resistance stays the same, current increases.
D. When resistance decreases and voltage stays the same, current decreases.
C. When voltage increases and resistance stays the same, current increases.
How old was Mrs Christl when she got married?
23 :D