P11 EM (5) - The motor principle

If two magnetic fields point the same direction, there will be a ___ force

• Attractive

• Repulsive

• Neutral

The magnetic field produced by a coil of wire is ___ than a straight wire

• Greater

• Less than

• Equal to

Current going into the page is denoted with the what symbol?

• X

• dot

• Y

• Z

Which of the following would not increase the strength of a solenoid's magnetic field?

• Increasing the current

• Increasing the number of windings

• Adding a plastic core

• Connecting it to a potential difference

In the right-hand rule for a solenoid, your fingers are in the direction of

• The current

• The external field

• The N side

• The S side

In the right-hand rule for the motor principle, your fingers are in the direction of

• The current

• The external field

• The N side

• The S side

In the right-hand rule for a solenoid, your thumb is in the direction of

• The current

• The external field

• The N side

• The S side

In the right-hand rule for the motor principle, your thumb is in the direction of

• The current

• The external field

• The N side

• The S side

The solenoid in a subwoofer or speaker is called the

• Sub-coil

• Voice coil

• Permanent coil

• Motor

Analog meters are based around a resistor and

• A galvanometer

• An ammeter

• A voltmeter

• A digital display