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Worksheets

AC Slater

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

An AC generator operates on the principle of...

a)

electromagnetic induction

b)

reactive resistance

c)

inductive reactance

d)

magnetic fluctuation

2.

The voltage induced in a conductor is ___________ ___________ to the rate which the conductor cuts the magnetic lines of force.

a)

inversely proportional

b)

directly proportional

c)

negatively coorelated

d)

absolutely opposite

3.

In order for electromagnetic induction to occur, you need...

a)

a conductor

b)

a magnetic field

c)

relative motion

d)

all three

4.

In an AC generator, the wire loop which is mounted so that it rotates within a magnetic field is called the....

a)

coil

b)

armature

c)

slip rings

d)

brushes

5.

In an AC generator, the contacts are made from a soft but highly conductive material, usually carbon, and are called...

a)

coils

b)

armatures

c)

slip rings

d)

brushes

6.

What is this?

a)

sawtooth wave

b)

square wave

c)

sine wave

d)

triangular wave

7.

The sine wave's maximum instantaneous values, both above and below the horizontal line, are defined as...

a)

positive peak

b)

negative peak

c)

peak values

d)

peak a boo

8.

The process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.

a)

Variance

b)

Alternation

c)

Modulation

d)

Waveform

9.

Any continuous signal for which the time-varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.

a)

Analog Signal

b)

AC

c)

Module

d)

Digital Signal

10.

An electrical signal that is converted into a pattern of bits (1s and 0s). Unlike an analog signal, which is a continuous signal that contains time-varying quantities, a _____________ has a discrete value at each sampling point.

a)

Analog Signal

b)

Digital Signal

c)

Smoke Signal

d)

Optical Signal

11.

What is this?

a)

Digital Multimeter

b)

Oscilloscope

c)

Ohmeter

d)

Galvonometer

12.

Electrical devices consisting of two or more coils of wire used to transfer electrical energy from high voltage/low current to low voltage/high current, or visa versa, using electromagnetic induction.

a)

Capacitor

b)

Transformer

c)

Transistor

d)

Resistor

13.

Cycles per second

a)

Hertz

b)

Ohms

c)

Amps

d)

Watts

14.

Ultra-high-frequency (UHF) or microwave part of the radio-frequency (RF) waves used to detect the position and/or movement of objects by bouncing the radio waves off the object and measuring the interval of the echo. The name for this is an acronym for "radio detection and ranging."

a)

SONAR

b)

RADAR

c)

LASER

d)

X-Ray

15.

Electromagnetic radiation in the range of frequencies lower than microwaves, found useful for long-range communication.

a)

Radio Waves

b)

Audio Waves

c)

Light Spectrum

d)

Infrared