Basic Electrical Circuits

The contacts of a(n) ____________ switch are open until acted in by the operator.

Normally open

Which of the following is a manually operated switch? a. pushbutton switch b. selector switch c. knife switch d. all of the above

all of the above

Which of the following is an electrical output device? a. motor b. lamp c. resistor d. all of the above

all of the above

Which of the following is true of an electrical schematic diagram? a. represents components with standard symbols. b. shows how the components are interconnected. c. is helpful in troubleshooting a circuit d. all of the above

all of the above

The electrical wall outlets at home are a source of __________ current.

alternating

A(n) ___________ determines if electricity is present in a circuit.

circuit tester

A knife switch consists of a lever and one or more sets of __________.

contacts

Electricity is the flow of __________ in a conductor.

electrons

Which of the following is not a component of a basic electrical circuit? a. input device b. output device c. insulator d. power supply

insulator

Constant voltage power supplies will maintain a constant voltage output under varying __________.

loads

Rotary motion is the output of which electrical output device?

motor

A simple method for opening or closing a circuit is to use a __________.

switch