Charge It Up
Circuits
Resistance
Energy Transformation
Cells & Batteries
Electricity/Magnetism
100
Your teacher explains to you that a glass of water is neutral. What does she mean by this?
A. The water has no protons or electrons.
B. The water is unaffected by static electricity.
C. The water has an equal number of protons and electrons.
D. The water is not attracted to positively or negatively charged objects.
C
100
The rate at which charged particles flow is called
A. current
B. voltage
C. resistance
D. potential difference
A
100
You have learned that resistance in a wire changes with both the length and diameter of the wire. Which wire would offer the most resistance to an electrical current?
A. a wire that is 50 cm long and has a diameter of 3 mm
B. a wire that is 25 cm long and has a diameter of 3 mm
C. a wire that is 50 cm long and has a diameter of 1.5 mm
D. a wire that is 25 cm long and has a diameter of 1.5 mm
C
100
The blow dryer transforms electrical energy into what other forms of energy?
A. chemical and mechanical
B. chemical and thermal
C. thermal and mechanical
D. mechanical and electrical
C
100
Which of the following parts of a lead storage car batter is acidic?
A) Electrode
B) Electrolyte
C) Anode
D) Cathode
B
100
Which of the trials will produce the most current in the galvanometer?
A) 1
B) 2
C) 3
D) 4
D
200
In science class, you learned that a conductor is a material that passes electrons easily and that an insulator is a material that does a poor job of conducting (or passing) electrons. How are the electrons in an insulator different from the electrons in a conductor?
A. The electrons in an insulator are tightly bound to the positively charged nucleus.
B. The electrons in an insulator are bound loosely to the positively charged nucleus.
C. The electrons in an insulator flow toward the negative terminal.
D. There are no electrons present in insulating materials.
A
200
Using the hair dryer near water could result in a dangerous short circuit. This is because
A. water will corrode and ruin the switch
B. water provides an alternative path for current to flow
C. the fan is not meant to force water
D. tap water cannot conduct electricity
B
200
Which of the following types of tungsten wire will offer the most resistance?
A) a short, thick wire
B) a long, thick wire
C) a short, thin wire
D) A long, thin wire
D
200
Energy is transformed in car 1 from
A) mechanical to light to electrical
B) light to electrical to mechanical
c) sound to mechanical to electrical
d) chemical to electrical to mechanical
D
200
Starting with statement A determine if the statements are true (1) or false (2). Write a 4 letter number system composed of 1s and 2s.
2121
200
1. Which of the following modifications to an electromagnet will increase its strength?
A) Using a larger iron core
B) Using fewer coils of copper wire
C) Increasing the resistance of the iron core
D) Decreasing the current passing through the coils of copper wire
A
300
After removing the laundry from the clothes dryer, you notice that two socks are sticking together. An explanation for what has happened is
A. protons have moved from one sock to the other, making one positively charged sock and one negatively charged sock
B. one of the socks has gained electrons from the other sock, causing it to become negative while causing the other sock to become positive
C. both socks have gained protons and, as a result, are attracted to each other
D. both socks have gained electrons and, as a result, are attracted to each other
B
300
C
300
Which of the following wires would produce the lowest ohmmeter reading when connected to a battery of three cells?
A) wire 1
B) wire 2
C) wire 3
D) wire 4
D
300
The energy conversions that take place from the time the plunger is pushed down to the time the explosives detonate are from:
A) electrical to mechanical to chemical
B) mechanical to electrical to chemical
C) mechanical to electrical to mechanical
D) mechanical to chemical to electrical
B
300
The best combination of metals to use as electrodes would be?
A) copper and aluminium
B) aluminium and zinc
C) zinc and copper
D) lead and zinc
C
300
The device that converts electrical energy into mechanical energy is known as a ...
motor
400
Non-conductors, or insulators, must be neutralized with this ...
A. discharge
B. radiation
C. ionization
D. recharger
C
400
Which of the components in the models represents current in a circuit?
A) I
B) II
C) III
D) IV
A
400
When connected, which of the electrical circuits described above will result in the dimmest light?
A) circuit 1
B) circuit 2
C) circuit 3
D) circuit 4
B
400
In travelling across the room, the car converted:
A)solar energy into electrical energy into mechanical energy
B) solar energy into mechanical energy into electrical energy
C) solar energy into potential energy into chemical energy
D) solar energy into thermal energy into chemical energy
A
400
Which of the following combinations of cells, connected in series, would not make a 3 V battery?
A) 3 lead & zinc cells
B) 2 copper& zinc cells
C) 6 Aluminium& zinc cells
D) 3 aluminium& lead cells
D
400
Hans Christian Oersted found that an electric current created a magnetic field. When electrical energy passes over a compass, the compass needle ...
A. spins
B. is deflected
C. rotates clockwise
D. rotates counterclockwise
B
500
What will happen if balloon 1 is brought near balloon 2?A) Ballon 1 will repel balloon 2
B) Balloon 1 will attract balloon 2
C) Balloon 1 will fuse with ballon 2
D) Ballon 1 will have no effect on ballon 2
A
500
A ride in an amusement park is controlled by an operator who turns a dial to make the seats rotate faster. As the operator turns the dial, more current flows to the motors. Which of the following electrical devices causes the seats on the amusement park ride to rotate faster?
A) Variable resistor
B) Circuit breaker
C) Generator
D) Ammeter
A
500
What is the name of this device?
a fuse should be inserted
500
Match each energy device with the energy conversion that takes place in it.
____ ____ _____ ______
Cell Generator Motor Thermocouple
5146
500
Henry is using a cell which has a liquid electrolyte, however he can not recharge it. What type of cell does he have?
primary & wet
500
Mr. Jones was trying to make an electromagnetic coil to demonstrate the power it has. His coil worked, but not very well. The most likely reason was because the ...
A. coil was made of copper wire
B. battery was brand new
C. metal core was too thin
D. battery was dead
C
600
When Sarah removed a load of clothes from the dryer, she noticed that all the sweaters stuck together. This is an example of:
A) static electricity produced by like charges
B) current electricity produced by neutral objects
C) static electricity produced by unlike charged
D) current electricity produced by conducing clothes
C
600
If the three characteristics were considered in this circuit, which lamps would continue to light?
A) only L2
B) L2 and L3
C) L2, L3, and L5
D) L2, L3, and L4
B
600
An electric heater uses 12 A of electricity when plugged into a 120 V outlet. What is the resistance of the heater?
10 ohms
600
The energy conversion taking place to light the cabin is:
A) electrical to light to mechanical
B) mechanical to light to electrical
C) electrical to mechanical to light
D) mechanical to electrical to light
D
600
What arrangement of three cells will result in greatest electric current?
Series
600
Electric effects can be created using a magnet. In1831 Michael Faraday (and Joseph Henry) discovered ...
A. electrolysis
B. electric charges
C. electromagnetic radiation
D. electromagnetic induction
D
700
A
700
A galvanometer is an instrument that uses a magnetic needle in an electrical field to detect small currents of electricity.
In order to measure the electrical current in a circuit, a galvanometer is connected...
A) in series to the circuit
B) in parallel to the circuit
C) at any point in the circuit
D) near the cell in the circuit
A
700
A standard 120 V electrical outlet can handle a maximum of 15 A of current. If an appliance with a resistance of 12 ohms is plugged in, how many amperes of current are available for another appliance?
A) 5
B) 3
C) 10
D) 12
A
700
C
700
Which of the following could be used as an electrolyte?
A) boric acid
B) carbon dioxide
C) calcium bromide
D) CH2O
E) A and C
E
700
Which of the following changes would not increase the reading on the galvanometer?
A. Moving the magnet faster in the coil
B. Wrapping more wire around the coil
C. Reversing the poles of the magnet
D. Using a stronger magnet
C