The current in a circuit is halved. What happens to the resistance?
V=IR
(1 point)
Responses
The resistance is tripled.
The resistance is tripled.
The resistance is doubled.
The resistance is doubled.
The resistance stays the same.
The resistance stays the same.
The resistance is halved.
The resistance stays the same.
A flashlight has four 1.5-volt batteries. The bulb has a resistance of 2.4 ohms. What is the amperage of the circuit?
V=IR
(1 point)
Responses
0.4 A
0.4 A
2.5 A
2.5 A
14.4 A
14.4 A
0.625 A
0.625 A
Calculation:
V = 4 * 1.5 V = 6 V
R = 2.4 ohms
I = V / R
I = 6 V / 2.4 ohms
I = 2.5 A
Which statement about energy is correct?(1 point)
Responses
Energy is the force that causes objects to be displaced.
Energy is the force that causes objects to be displaced.
All energy comes from one of two sources: chemical bonds in an object’s molecules, or the state or position of the object.
All energy comes from one of two sources: chemical bonds in an object’s molecules, or the state or position of the object.
All energy can be categorized as kinetic energy or potential energy.
All energy can be categorized as kinetic energy or potential energy.
There are many types of energy. Energy can be light energy, sound energy, thermal energy, chemical energy, and electrical energy.
All energy can be categorized as kinetic energy or potential energy.
How do electrons flow through an electric circuit?(1 point)
Responses
The electrons flow out of the positive end of the battery, through the wires of the circuit, and back into the negative end of the battery.
The electrons flow out of the positive end of the battery, through the wires of the circuit, and back into the negative end of the battery.
The electrons flow out of the negative end of the battery, through the wires of the circuit, and back into the positive end of the battery.
The electrons flow out of the negative end of the battery, through the wires of the circuit, and back into the positive end of the battery.
The power source pushes electrons through the circuit.
The power source pushes electrons through the circuit.
The device that is using the electricity pulls electrons through the circuit.