AnswersSY2025-26 - 2002040 MJ Comprehensive Science 1 Sem 1 CRTest

Magnets and Magnetism Answers

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1
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Why does Chelsea see sparks as she removes her clothes from the clothes dryer?

A
conduction
B
induction
C
static discharge
D
loss of protons
2
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What is the name of the area around a charged object where the object can exert a force on other charged objects?

A
electric field
B
electric charge
C
electric induction
D
electric force
3

Alfredo makes a diagram to organize his notes about charging objects.

Question illustration
A
It does not involve touching the objects together.
B
The objects develop opposite charges.
C
Electrons do not move between objects.
D
The objects have the same charge.
4

What would make oppositely charged objects attract each other more?

A
increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
B
decreasing the positive charge of the positively charged object and decreasing the negative charge of the negatively charged object
C
increasing the distance between the positively charged object and the negatively charged object
D
maintaining the distance between the positively charged object and the negatively charged object
5

A negatively charged rod is placed near two neutral metal spheres, as shown below.

Question illustration
A
The spheres are charged through friction.
B
The spheres develop the same charge.
C
Electrons move from the rod to Sphere A.
D
Electrons move from Sphere A to Sphere B.
6

Hiro rubs an inflated balloon on his hair, and his hair sticks to the balloon. As he moves the balloon away from his head, how does the electric force change?

A
The electric force increases because the balloon loses its charge.
B
The electric force increases because the distance increases.
C
The electric force decreases because the distance increases.
D
The electric force decreases because his hair loses its charge.
7

The diagram shows two charged objects, X and Y.

Question illustration
A
X: positiveY: negative
B
X: negativeY: neutral
C
X: negativeY: neutral
D
X: positiveY: positive
8

Which factors affect the strength of the electric force between two objects?

A
the mass of the objects and the distance between the objects
B
the amount of charge on the objects and the type of charge on the objects
C
the distance between the objects and the amount of charge on the objects
D
the mass of the objects and the amount of charge on the objects
9

An electroscope is a device that detects charge on objects that touch it or are brought near it. John rubs a piece of cotton fabric on a plastic rod and then touches the rod to the electroscope.

A
John charges the rod through induction, then charges the electroscope through friction.
B
John charges the rod through conduction, then charges the electroscope through induction.
C
John charges the rod through friction, then charges the electroscope through induction.
D
John charges the rod through friction, then charges the electroscope through conduction.
10

How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

A
The electric force increases because the amount of charge has an indirect relationship to the force.
B
The electric force increases because the amount of charge has a direct relationship to the force.
C
The electric force decreases because the amount of charge has an indirect relationship to the force.
D
The electric force decreases because the amount of charge has a direct relationship to the force.

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