Quiz
Electric Fields
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Perguntas do quiz (9)
1How does the force between two charges vary with the distance between them?
- AProportionally to the distance between them.
- BProportionally to the square of the distance between them.
- CInversely proportional to the distance between them.
- DInversely proportional to the square of the distance between them.
2How does the force between two charges vary with respect to charge?
- AProportional to the charge.
- BProportional to the square of the charge.
- CInversely proportional to the charge.
- DInversely proportional to the square of the charge.
3The magnitude of the force between two charges is 5N. What is the force if one charge is doubled?
- A1/5 N
- B5 N
- C10 N
- D25 N
4Continuing from Question 3. What is the force of the distance between them is reduced to 0.25m from 1m?
- A80 N
- B40 N
- C20 N
- DNone of the above.
5A point charge, qA = +2.5 mC is situated 2 metres from a second point charge, qB = -1.5 mC. What is the magnitude of the electrostatic force between the two charges?
- A9,000,000 N
- B8437.5 N
- C16,875 N
- D2,250,000 N
6Field lines point in the direction a positive charge would move if placed within that field.
- AVerdadeiro
- BFalso
7Which of the following statements about electric fields are correct.
- AMoving a charged object near an uncharged object causes the uncharged object to be repelled.
- BThe closer field lines are together the stronger the force is.
- CIn an electric field, the stronger the electric field is the larger the force on a charge in the field.
- DLike charges repel and unlike charges attract.
- EThe sign of the charge (positive or negative) affects the magnitude of the force.
- FThe sign of the charge (positive or negative) affects the direction of the force.
- GThe closer two charges are together the weaker the electrostatic force between them.
- HThe units for electric field strength are Newtons/metre.
8If a 25 mC charge experiences a force of 25 N on it. What electric field strength must it be experiencing?
- A1 N
- B1000 N
- C625 N
- D0.001 N
9The reason a charged balloon will stick to a wall is that:
- AThe charge is slightly sticky and acts like glue.
- BBalloon material sticks to walls.
- CElectrons hop back and forth between the wall and the balloon.
- DInduced opposite charges in the wall are closer than other wall charges.
Informações
- Descrição
- Quiz sobre Electric Fields, criado por angus.magarey340 em 31-05-2014.
- Autor
- angus.magarey340
- Idioma
- English
- Visualizações
- 54
- Avaliação
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