NCFE Physical Science Practice

Object X and Object Y are rubbed together. Object X acquires a negative charge. What does Object Y experience?

• a gain of protons

• a loss of protons

• a gain of electrons

• a loss of electrons

Tags

NGSS.MS-PS2-5

A positively charged ball is placed an equal distance between two charged objects (1 and 2). In which case will the positively charged ball move toward Object 2?

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Tags

NGSS.HS-PS2-4

Which is a true statement about a series circuit?

• All the current flows through every part of the circuit.

• Every part of the circuit is positively charged.

• The current through the circuit can take several paths.

• Every part of the circuit is negatively charged.

This diagram represents a circuit with three 20-ohm light bulbs. The battery is 10 volts. If light bulb 3 burns out in the circuit, what will happen to light bulb 1 and light bulb 2?

• Light bulb 1 and light bulb 2 will work.

• Light bulb 1 and light bulb 2 will not work.

• Light bulb 1 will work, but light bulb 2 will not work.

• Light bulb 1 will not work, but light bulb 2 will work.

A student wants to build a simple circuit. Which material would be used to design a circuit with the least amount of resistance?

• long wires with a thin diameter

• long wires with a large diameter

• short wires with a thin diameter

• short wires with a large diameter

Two magnets are stuck end to end by a magnetic force. Which statement best describes these magnets?

• The north poles of the magnets are attracted to each other.

• The south poles of the magnets are attracted to each other.

• The south pole of one magnet is repelled by the north pole of the other magnet.

• The north pole of one magnet is attracted to the south pole of the other magnet.

Tags

NGSS.HS-PS3-5

Which action will have the least effect on the strength of an electromagnet?

• changing the amount of current

• changing the current’s direction

• changing the number of wire loops

• changing the size of the metal core

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

In cars with electric door locks, electromagnets allow the doors to be locked and unlocked at the push of a button. Why is an electromagnet used for this kind of door lock?

• Using electromagnets conserves electricity.

• Using electromagnets prevents static electric shock.

• Electromagnets can easily be turned off.

• Electromagnets can attract metals or nonmetals.

Tags

NGSS.HS-PS2-5

Which diagram correctly shows how electrically charged balls will act?

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Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

A circuit has 2.25 amps of current and a resistance of 4.00 Ω. What is the voltage difference across the circuit?

• 9 V

• 6.25 V

• 1.78 V

• 0.56 V