ELECTRONICS CHAPTER 1 2

If the resistance in a circuit with constant voltage increases, the current will

• increase

• decrease

• stay the same

• not enough information

If voltage across a resistance doubles

• the current is halved

• the resistance doubles

• the current is unchanged

• none of the above

The component that produces power in an electromagnetic generator is called the

• armature

• field winding

• commutator

• brush

A parallel circuit differs from a series circuit in that a parallel circuit has

• no path for current flow

• fewer paths for current flow

• one path for current flow

• more than one path for current flow

What effect will a parallel tank have upon final filter current?

• very little

• The bandpass frequencies will change.

• The frequency cutoff will change.

• The impedance will block output.

Which of the following units can represent magnetic flux density?

• The volt-turn

• The ampere-turn

• The gauss

• The gauss-turn

Magnetic materials with greater hysteresis loop are best suited for

• electromagnet

• permanent magnet

• artificial magnet

• natural magnet

Power supplies differ from batteries in that

• power supply output voltages are ac and not dc

• power supply voltages are not stable

• power supplies are low-current devices

• None of the above

Where do you classify cobalt as material?

• Non-magnetic

• Ferromagnetic

• Paramagnetic

• Diamagnetic

Flux linkage equals

• flux times area of core

• flux times number of turns times area of core

• flux times number of turns times length of core

• flux times number of turns