Magnetism

Technician A says that magnetic lines of force can be seen by placing iron filings on a piece of paper and then holding them over a magnet. Technician B says that the effects of magnetic lines of force can be seen using a compass. Which technician is correct?

Both

Unlike magnetic poles ________ and like magnetic poles ________.

Attract, repel

Technician A says that a relay is an electromagnetic switch. Technician B says that a solenoid uses a movable core. Which technician is correct?

Both

Two technicians are discussing electromagnetic induction. Technician A says that the induced voltage can be increased if the speed is increased between the conductor and the magnetic lines of force. Technician B says that the induced voltage can be increased by increasing the strength of the magnetic field. Which technician is correct?

Both

Electromagnetic interference can be reduced by using a ________.

Coil, capacitor, and resistance. All of the above.

How can the electromagnetic strength of an energized coil of wire be increased?

Increase the number of turns in the colied wire, place an iron core in the middle of the coil, increase current flow through the coil. ANY OF THESE. 

Technician A says that magnetism can cause electric current to flow in a conductor. Technician B says that magnetic lines of flux can never penetrate rubber insulation on a conductor. Which technician is correct?

Tech A

Which of these uses a movable core to act as an electric switch?

Solenoid

Which term describes current flow produced in a complete circuit when a magnetic field is moved back and forth across the circuit path?

Electromagnetic induction

When discussing induced voltage caused by a magnetic field moving across a complete circuit, technician A says that the direction of current flow depends on the direction of movement of flux lines. Technician B says that the direction of current flow is called polarity. Which technician is correct?

Both