ok so i keep getting one wrong on a 4 question test and failing so can someone tell me what im getting wrong
1. What causes an electric current in a wire?
A. Electric fields cause atoms to move in the wire.
B. Electrons flow because of electrical attraction and repulsion.
C. Electrons move because of heat.
D. Electrons build up in the wire and create a charge.
(my answer for this one was B)
2. How does an insulator stop the flow of an electric current?
A. Insulators have too many electrons.
B. Insulators have a positive charge so they absorb electrons.
C. Electrons in an insulator do not move readily.
D. Insulators convert electric energy to other forms of energy.
(my answer for this one is A)
3. What material would make the best heating element for an electric range?
A. a resistor, which converts some electric energy to thermal energy
B. an insulator, which stops the flow of electricity
C. a conductor, which carry electric currents
D. a conductor surrounded by an insulator
(my answer for this one is A)
4. Which of the following materials is a conductor of electric current?
A. a plastic game piece
B. a wooden spoon
C. a copper penny
D. a glass window
(my answer for this one is C but i don't think it's right)
thanks! :o)
1B
2C
3A
4C
thank you!
wow that was close
1.B
2.C
3.A
4.C
i know that person sounds smart but Elena is smarter
B
C
A
C
i agree with them
To determine what answers you are getting wrong, let's go through each question and explain the correct answer:
1. What causes an electric current in a wire?
The correct answer is B. Electrons flow because of electrical attraction and repulsion.
To understand this, imagine that the wire is a pathway for electrons. The negatively charged electrons are attracted to the positively charged end of the wire and repelled by the negative end. This attraction and repulsion causes the electrons to move, creating an electric current.
2. How does an insulator stop the flow of an electric current?
The correct answer is C. Electrons in an insulator do not move readily.
Insulators are materials that do not allow electrons to move through them easily. They have tightly bound electrons, which do not have the freedom to move like in conductors. This restraint prevents the flow of electric current through the material.
3. What material would make the best heating element for an electric range?
The correct answer is A. a resistor, which converts some electric energy to thermal energy.
A heating element in an electric range is designed to convert electrical energy into heat. Resistor materials have high resistance, which means they resist the flow of electric current, thus converting some of that electric energy into thermal energy or heat.
4. Which of the following materials is a conductor of electric current?
The correct answer is C. a copper penny.
A conductor is a material that allows electric current to flow through it easily. Metals, like copper, are good conductors because they have free electrons that can move freely through the material. In contrast, plastic, wood, and glass are insulators and do not conduct electric current well.
Based on the correct answers, it seems like you got questions 1 and 3 correct, but questions 2 and 4 wrong. Your answers for questions 1 and 3 (B and A, respectively) are correct. However, for question 2, you chose answer A, which is incorrect. The correct answer is C. For question 4, your answer C is correct. So it appears the only question you got wrong is question 2.
I hope this explanation helps you understand the correct answers. Good luck with your next test!