FREE AND STUDY GAMES ABOUT PHYSICS MODULE 5

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FREE AND STUDY GAMES ABOUT PHYSICS MODULE 5

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -71 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Conductor

Answer:

A metal or other substance with electrons that are free to produce a current

Question 2: What causes the armature to rotate in a simple motor?

Answer:

Two magnetic fields trying to align Question 3: A commutator ring in a generator design is attached to which of the following?

Answer:

Armature

Question 4: Electric motor

Answer:

A motor in which current is supplied to create a magnetic field around the coils, which are moved by the magnetic field of the stronger permanent magnets surrounding the coil. This motion makes the motor turn.

Question 5: Solenoid

Answer:

A device typically made by positioning an iron or steel core in the middle of a coil of wire, thereby increasing the strength of an electromagnet's magnetic field.

Question 6: Dipole

Answer:

A tiny magnetic field created by a single spinning electron Question 7: According to the laws of magnetism, how will the north pole of one magnet react to the south pole of another magnet if placed very close together?

Answer:

Attract

Question 8: What is the right-hand rule used to determine?

Answer:

Direction of magnetic flux

Question 9: Water is magnetically classified as which of the following?

Answer:

Diamagnetic Question 10: An iron bar wrapped with a wire carrying electric current is what class of magnet?

Answer:

Electromagnet

Question 11: Self-induction

Answer:

The process that occurs in a single coil of wire when an alternating current flows through it; the flow of electrons in one direction produces a magnetic field that induces a second current to flow in the wire, but in the opposite direction.Question 12: the following describes four different coil. Which one, if moved through the magnetic field, would create the greatest voltage? 10 turns, 20 turns, 30 turns, 40 turns?

Answer:

40 turns. The greater the number of turns the greater the induced voltage. If you double the turns, you double the resultant voltage.

Question 13: Platinum is magnetically classified as what?

Answer:

Paramagnetic

Question 14: Third characteristics of the Magnetic field

Answer:

Magnetic fields are distorted by magnetic materials and unaffected by nonmagnetic materials.

Question 15: Paramagnetic

Answer:

(i.e. platinum, gadolinium, aluminum) These are weakly attracted to magnetic fields Question 16: Moving a conductor by manual means within a magnetic field is the basic

operation of a:

Answer:

Generator Question 17: Transformers operate best with:

Answer:

AC

Question 18: Armature

Answer:

A coil of wire that rotates inside a magnetic field to produce an electric current. The more turns of wire in the coil, the higher the voltage induced in the wire.

Question 19: Magnetic domain

Answer:

A property of magnets in which the atoms in a small region are all aligned to produce a local magnetic field.

Question 20: Direct-current motor

Answer:

A motor in which a commutator ring with rotating contacts or brushes reverses the current's direction in the coils as they rotate in the magnetic field of the permanent magnets. This ensures that the motor keeps turning in one direction.

Question 21: Mutual induction

Answer:

The phenomenon in which a current in one conductor induces a current to flow in another conductor

Question 22: Ferromagnetic

Answer:

(i.e. iron, cobalt, nickel) These are strongly attracted to magnets

Question 23: A simple generator will produce which current type?

Answer:

AC Question 24: A coil of wire is being moved through a magnetic field. If the speed with which it is moved is doubled, what happens to the resulting voltage?

Answer:

Doubles also

Question 25: Step-down transformer

Answer:

A device included in the filament circuit to lower the voltage to the filament Question 26: The commuter ring in a generator design briefly breaks contact between the armature and circuit. T or F?

Answer:

True Question 27: In which device does a commutator ring serve to feed current through an armature the same direction each time?

Answer:

Motor

Question 28: Electromagnetic induction

Answer:

A current that is induced to flow in a wire by moving the wire through a magnetic field or by moving a magnetic field through the wire, or by varying the strength of the magnetic field