Which of the following would have a light bulb turned on?
a wire and a load only
a break in the wire
an open switch
a closed switch
a closed switch
Is this correct? If so, please explain
Yes, a closed switch would cause the light bulb to turn on. When a switch is closed, it completes the circuit and allows the electric current to flow from the power source, through the wire, to the light bulb (load), causing it to illuminate. In the case of just a wire and a load without any other components, a closed switch is necessary to complete the circuit and power the light bulb.
If a positive test charge was placed in this electric field, where would you expect it to go? Drag and drop the best answer into the white box.
DRAG & DROP THE ANSWER
toward the negative charge
stay in place but start spinning
toward the negative charge along an electric field line
toward the positive charge
toward the negative charge along an electric field line
Doubting Dennis doesn't believe in electromagnetism so he makes an electromagnet to prove his teacher wrong. To his surprise, the electromagnet works and he's able to pick up metal objects with it. Even still, he's not satisfied with his electromagnet because it's very weak. What can he do to make it stronger? Drag the best answer into the white box.
DRAG & DROP THE ANSWER
wrap the wire around the nail less times
use a weaker battery
glue the wire to the nail
use a plastic nail
use a stronger battery
use a stronger battery
Which of the following tables accurately shows the objects that are conductors and insulators?
A: Rubber band: Yes
Crayon: No
Wooden Popsicle Stick: No
Eraser: No
B: Dime: Yes
Staple: Yes
Penny: Yes
Aluminum Foil: No
C: Rubber Band: No
Crayon: No
Wooden Popsicle Stick: No
Eraser: No
D: Dime: Yes
Staple: Yes
Penny: Yes
Aluminum Foil: Yes
B: Dime: Yes, Staple: Yes, Penny: Yes, Aluminum Foil: No
Oops, made a mistake
Which of the following tables accurately shows the objects that are conductors and insulators?
A: Rubber band: Yes
Crayon: No
Wooden Popsicle Stick: No
Eraser: No
Dime: Yes
Staple: Yes
Penny: Yes
Aluminum Foil: No
B: Rubber Band: No
Crayon: No
Wooden Popsicle Stick: No
Eraser: No
Dime: Yes
Staple: Yes
Penny: Yes
Aluminum Foil: Yes