Isabellas science test

Question 1

What natural electrostatic phenomenon is an accumulation of electrons around pointed objects that result in an eerie blue glow

Answer 1

Saint Elmo’s Fire

Question 2

General term for a device that produces static electricity

Answer 2

Electrostatic generator

Question 3

Who discovered that mechanical motion can produce electricity by magnetic force

Answer 3

Michael Faraday

Question 4

Who patented the telegraph

Answer 4

Samuel Morse

Question 5

Whose experiment demonstrated that lightning is caused by static electricity

Answer 5

Benjamin Franklin

Question 6

Who built the first electrostatic generator

Answer 6

Otto von Guercke

Question 7

T/f: a small AC generator that charges a car’s battery and operates its electrical system while the car is running is a rectifier

Answer 7

False- alternator

Question 8

T/f: an electrostatic method of reproducing images on paper is a typograph

Answer 8

False- xerograph (AKA) xerox

Question 9

T/f: The most important device for converting electricity into motion is the relay

Answer 9

False- electric motor

Question 10

T/f: electric charge on an object always moves to the inside of an object

Answer 10

False- outside

Question 11

T/f: a modern lamp that consists of a long, coiled tube and can be used in sockets designed for incandescent lamps is an LED lamp

Answer 11

False - compact fluorescent lamp

Question 12

T/f: a semiconductor or device that emits light when a direct electric current is applied is a light emitting diode (LED)

Answer 12

True

Question 13

T/f: A device in which conducting fluid passes through a magnetic field at high speeds is a magnetic hydromatic Dynamic generator

Answer 13

True

Question 14

How does a fluorescent lamp produce light

Answer 14

Passing current through a narrow tube of gas

Question 15

How does an incandescent lamp produce light

Answer 15

Heating of a thin piece of wire

Question 16

Most common type of electrostatic generator

Answer 16

Van de Graaff generator

Question 17

What is the difference between an AC generator and a DC generator

Answer 17

One has a commuter, and one has a slip ring

Question 18

How does lightning form

Answer 18

Opposite charges accumulated in a cloud and on the ground cause an electrostatic discharge

Question 19

Explain why metal topped car is safe during a thunderstorm

Answer 19

Charge passes over the outside surface of the car

Question 20

How was the leyden jar used to store electricity

Answer 20

The charge was stored on the foil lining inside the glass jar

Question 21

What is a component of an AC electric generator that keeps its wires from twisting

Answer 21

A slip ring

Question 22

A component within an electric motor that is freely “?” an electric magnet mounted to the shaft

Answer 22

Armature

Question 23

Converts absorbed sunlight directly into electricity

Answer 23

Photovoltaic

Question 24

Converts electricity into sound waves

Answer 24

Loudspeaker

Question 25

Electrical switch operated by an electromagnet

Answer 25

Relay

Question 26

Designed to convert electricity into back and forth motion

Answer 26

Solenoid

Question 27

Uses electromagnets to allow communication over long distances

Answer 27

Telegraph

Question 28

A device for protecting buildings and other structures from lightning

Answer 28

Lightning rod

Question 29

Negative terminal of a voltic cell is called an

Answer 29

Anode

Question 30

Early device developed by Musschendrock to store electric charge was the

Answer 30

Leyden jar

Question 31

First electric light suitable for households

Answer 31

Incandescent lamp

Question 32

To boost the available voltage, electrochemical cells can be arranged in

Answer 32

Series

Question 33

A material that glows when exposed to reduction

Answer 33

Phosphor

Question 34

A permanent magnet used to provide a stationary magnetic field

Answer 34

Field magnet

Question 35

One or more electrochemical cells connected to terminals as a single source of current from a

Answer 35

Battery

Question 36

A device that increases or decreases the voltage of AC is a

Answer 36

Transformer

Question 37

The ability of magnetism to convert mechanical motion into electric current

Answer 37

Electromagnetic induction

Question 38

Which type of electrochemical cell is not designed to be recharged

Answer 38

Voltaic cell

Question 39

What type of electric discharge lamp is filled with neon gas

Answer 39

Neon lamp

Question 40

Positive terminal of a voltaic cell

Answer 40

Cathode

Question 41

System of communication uses a combination of short and long clicks to transmit messages over long distances

Answer 41

Morse code