Explanation: As an electrical generator spins faster, it creates more current as is shown by graph B. 26) During induction, a positively charged rod is brought near to but not touching the electroscope. The presence of the charged object above the plate of the electroscope induces charges to move down into the gold leaves, giving the electroscope an overall positive charge. The positive leaves repel. The same process occurs when a negative rod is brought close to the electroscope. This time, the negative charges flow through the electroscope to the leaves. The leaves, once again, repel. Whether the charge is positive or negative, in each case, the experiment shows that like charges A) repel. opposite charges B) repel. friction produces C) current. electrons produce a D) current. Explanation: This experiment illustrates an important principle in electrostatics and that is The same principle like charges repel. applies to magnetism; like poles repel. 27) In this electric motor, an electric current causes the coil to rotate, changing magnetic energy to A) electrical energy. electrical energy to a B) magnetic force. potential energy to C) electrical energy. electrical energy to mechanical D) energy. Explanation: A simple motor changes electrical energy to mechanical energy. It contains an electromagnet that rotates between the poles of a magnet. The coil of the electromagnet is connected to a battery or other source of electric current. When an electric current flows through the wire in the electromagnet, a magnetic field is produced in the coil. Like poles of the magnets repel and unlike poles of the magnets attract. This causes the coil to rotate and changes electrical energy to mechanical energy. 28) Donna is attempting to make an electromagnet to pick up old nails in and around her driveway. Which of these materials would be best to use for the core in order to make the strongest electromagnet to pick up the most nails? A) water iron B) nail wooden C) stake plastic D) tube
Explanation: As an electrical generator spins faster, it creates more current as is shown by graph B. 26) During induction, a positively charged rod is brought near to but not touching the electroscope. The presence of the charged object above the plate of the electroscope induces charges to move down into the gold leaves, giving the electroscope an overall positive charge. The positive leaves repel. The same process occurs when a negative rod is brought close to the electroscope. This time, the negative charges flow through the electroscope to the leaves. The leaves, once again, repel. Whether the charge is positive or negative, in each case, the experiment shows that A) like charges repel. B) opposite charges repel. C) friction produces current. D) electrons produce a current. Explanation: This experiment illustrates an important principle in electrostatics and that is like charges repel. The same principle applies to magnetism; like poles repel. 27) In this electric motor, an electric current causes the coil to rotate, changing A) magnetic energy to electrical energy. B) electrical energy to a magnetic force. C) potential energy to electrical energy. D) electrical energy to mechanical energy. Explanation: A simple motor changes electrical energy to mechanical energy. It contains an electromagnet that rotates between the poles of a magnet. The coil of the electromagnet is connected to a battery or other source of electric current. When an electric current flows through the wire in the electromagnet, a magnetic field is produced in the coil. Like poles of the magnets repel and unlike poles of the magnets attract. This causes the coil to rotate and changes electrical energy to mechanical energy. 28) Donna is attempting to make an electromagnet to pick up old nails in and around her driveway. Which of these materials would be best to use for the core in order to make the strongest electromagnet to pick up the most nails? A) water B) iron nail C) wooden stake D) plastic tube
HS%20Standard%2010%202017.docx