ELECTRICITY QUESTIONS Part 2   Link  Link 2  
Study the circuit drawing to the right.  Which of the two following pictures matches the circuit sketch?

1. Below Left
2. Below Right

Which picture to the right shows a parallel circuit:
  1. first one 
  2. second one

 
Which picture below shows a series circuit schematic drawing?
  1. the one to the left 
  2. the one to the right

 

 

 
What happens when you remove a bulb from a parallel circuit?
  1. the remaining bulbs get brighter
  2. the rest of the bulbs go out
  3. there is no change
  4. the remaining bulbs get dimmer

 

Which device contains an electromagnet?
  1. doorbell
  2. toaster
  3. desk lamp
  4. oven
The animation below demonstrates how a/an:
  1. circuit
  2. generator
  3. electromagnet
  4. galvanometer

    works.

You make a hypothesis that the strength of an electro- magnet depends on the number of batteries in the circuit. Which variable should you change to check your hypoth- esis?

1.  size of the nail           2.  number of batteries
3.  number of paper clips that you wish to attract
4.  number of copper wire turns around the nail
The object at the right is a/an:
  1. galvanometer
  2. electromagnet
  3. generator
  4. resistor
 

We set up the circuit at the right.  We laid the following materials across the gap in the wire to see if the bulb would light.  We recorded our findings the chart below:

    Which conclusion does this information support?
  1. Only metals conduct electricity
  2. Rubber does not conduct electricity
  3. Not all materials conduct electricity
  4. A circuit is complete, even with a gap

This is a hidden circuit board.  Some of the contact points are connected to the back of the board.  The chart shows whether the light bulb lights when the two contact points are touched by the wires. 

 
Which circuit board to the right fits these observations?:
  1. A
  2. B
  3. C
  4. D
 
Someone made a hypothesis that the strength of an electromagnet depends on the number of coils of wire in the circuit.

To see if the hypothesis is correct which variable should we change in each test?

  1. size of the nail
  2. number of pins
  3. number of batteries
  4. number of coils of wire
The hypothesis the information in the chart to the right supports is that the strength of an electromagnets depends on the:
  1. number of batteries
  2. size of the nail
  3. number of turns of wire
  4. number of pins picked up
 
If you remove one of the bulbs in this circuit to the right, what would you expect to see?
  1. The left bulb will go out
  2. The left bulb will get brighter
  3. The left bulb will get dimmer
  4. The left bulb will not change
 
Someone moves a magnet rapidly back and forth inside a coil of wire.  The best inference (decision based on observation) to make from the diagram is that
  1. he is using a bar magnet
  2. the wire coil has 4 turns of wire
  3. an electric current has been produced
  4. the ammeter is registering a reading
 
What would happen if you spun the rotor of an electric motor by hand?
  1. You would create electricity
  2. You would merely heat up the wire coils
  3. Nothing would happen
  4. You would create an electromagnet in the rotor
How can you show that electricity creates a magnetic field?
  1. Place a copper wire near a magnet
  2. You can't - only magnets produce magnetic fields
  3. Move a wire near a magnetic field
  4. Use a compass near a wire with current flowing through it
 
Someone brought a number of objects near a positively charged feather and recorded the resulting observations on a chart. 
 		The best conclusion that you can make from the chart is:
  1. the tack. foil and paper have a negative charge
  2. plastic objects always carry a negative charge
  3. metal objects always carry a positive charge
  4. the balloon, comb and yarn have a negative charge
 
A conductor
  1. produces electric current by moving coils through a magnetic field
  2. is used to tell if there is an electric current flowing
  3. does not allow electric current to pass through easily
  4. is a material which allows electrons to pass easily from atom to atom

 
The illustration to the right is a photoelectric  cell.  What is it most like?
  1. a galvanometer
  2. an electromagnet
  3. a battery
  4. a generator

 
Electricity Test Part 1