Online TestScience

Electricity and Heat

Tnpsctricks TnpsctricksAugust 15, 2018
0 187 Less than a minute

Electricity and Heat - 8th Std Science

Congratulations - you have completed Electricity and Heat - 8th Std Science. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
The object to be electroplated is made as _____
A
Cathode
B
Anode
Question 2
A body will excess of electrons is ______
A
Positively charged
B
Negatively charged
Question 3
Charging a body by simply touching it is called _______
A
Conduction
B
Charging by friction
Question 4
The lower portion of a charged cloud generally carries
A
Positive charge
B
Negative Charge
Question 5
The degree of hotness or coldness of a body is
A
Temperature
B
coldness
Question 6
A simple circuit consists of
A
a cell, a switch and a bulb
B
a bulb, a wire and armature
Question 7
In a series circuit
A
different amount of current passes through bulb
B
same amount of electric current flows through all bulbs
Question 8
The electrical appliances of our houses are all connected in a
A
series circuit
B
parallel circuit
Question 9
Which one of the following is not a conductor?
A
copper
B
glass
Question 10
Which of the following is not an insulator?
A
wood
B
iron
Question 11
The process by which an electrolyte is decomposed with the help of electricity is
A
neutralisation
B
electrolysis
Question 12
The process by which metals like gold, silver are purified is called
A
electroplating
B
electrofiding
Question 13
The process by which one metal is coated over other metal under the process of electrolysis is
A
electroplating
B
electrorefining
Question 14
In the process of electroplating a silver spoon with gold, the Anode is
A
silver spoon
B
acidified gold chloride solution
Question 15
In the process of electroplating a silver spoon with gold, the Cathode is
A
silver spoon
B
acidified gold chloride solution
Question 16
Zinc coated iron is called
A
IG pipes
B
GI pipes
Question 17
Chromium coating is employed on
A
engine bearings
B
bath taps
Question 18
When the number of protons is higher than the number of electrons, the object is said to be
A
negatively charged
B
positively charged
Question 19
When the number of electrons is more than the number of protons, the object is said to be
A
negatively charged
B
positively charged
Question 20
A neutral object can be charged even without touching the neutral body with a charged body is  called
A
charge by friction
B
charge by induction
Question 21
LED is made up of
A
conductors
B
semi conductors
Question 22
Silver plating is used on
A
cycle rim
B
table ware
Question 23
When liquids are heated density of liquid
A
increases
B
decreases
Question 24
Lightning arrester was discovered by
A
John Dalton
B
Benjamin Frankli
Question 25
The transfer of heat without the help of any material or medium is called
A
conduction
B
radiation
Question 26
The transfer of heat due to the actual movement of particles is
A
conduction
B
convection
Question 27
The transfer of heat from a body at higher temperature to a body at lower temperature, when they are in direct contact is called
A
conduction
B
convection
Question 28
The electricity that we use in our houses is obtained through _______
A
power stations
B
fossil fuels
C
nuclear weapons
Question 29
A ___  electricity in large scale.
A
power station
B
fossil fuels
C
nuclear weapons
Question 30
The closed conducting path of current is known as an _____
A
magnetic circuit
B
electric circuit
C
current
Question 31
When the bulbs are connected end to end, the circuit is known as _______ circuit.
A
series
B
parallel
Question 32
In a series circuit _________ amount of electric current flows through all the bulbs.
A
same
B
Different
Question 33
The electrical appliances of our houses are all connected in a ______ circuit.
A
Series
B
parallel
C
Distributed
Question 34
__________ is a good conductor of electricity.
A
Silver
B
Aluminium
Question 35
Distilled water is a  __________ conductor of electricity.
A
poor
B
Good
C
Rich
Question 36
When current is passed through liquids, it produces a _______ change.
A
Physical
B
chemical
Question 37
The negative end of battery is known as __________.
A
cathode
B
anode
Question 38
Positive ions are attracted towards the _________.
A
cathode
B
anode
Question 39
___________ is the most common application of the chemical effects of electrical current.
A
electroplating
B
electroless plating
Question 40
In electroplating the metal to be coated is taken as  _____
A
Cathode
B
anode
Question 41
__________plating iron is called Galvanized iron.
A
Titanium
B
Chromium
Question 42
_________coated iron is Galvanized iron.
A
Zinc
B
Titanium
C
Iron
Question 43
__________ is caused by the accumulation of charges in the cloud.
A
Thunder
B
Lightning
Question 44
Molecules are made up of _________
A
atoms
B
Ions
Question 45
The ___________ is negatively charged.
A
Proton
B
electron
Question 46
An atom is said to be electrically _______when the number of protons and the number of electrons is not equal.
A
charged
B
Uncharged
Question 47
During the process of charging, only ___________are transferred from one object to another.
A
electrons
B
Protons
Question 48
The process of charging an object by rubbing with another object is known as charging by _______.
A
Traction
B
friction
C
Unfriction
Question 49
When a charged body is placed in contact with another body, charges get ____________ to be other body.
A
transferred
B
untransferred
Question 50
The process of charging a neutral object without touching it is called charging by ________ .
A
induction
B
Gas
C
Deduction
Question 51
Connecting a charged object to the earth with the help of physical contact is called ___________.
A
earthing
B
Grounding
C
Neutral
Question 52
________ connection is done to save human handling them safely and to save the appliances.
A
Moon
B
mars
C
earth
Question 53
_______clouds carry electric charges.
A
Thunder
B
Rain
C
Lightening
Question 54
_________ is a high energy electric discharge.
A
Lightning
B
Thunder
C
Rain
Question 55
The upper portion of a cloud carries ______ charges.
A
Neutral
B
Negative
C
positive
Question 56
______________ gives the measure of the degree of hotness or coldness of a body.
A
temperature
B
Celcius
Question 57
The electrical resistance of a conductor  ___________ on heating.
A
Decreases
B
increases
Question 58
For the same amount of heat given the solids expand the ___________
A
least
B
Most
Question 59
Transfer of heat from a body at a higher temperature to a body at a lower temperature when in direct contact is called __________.
A
Condenzation
B
Induction
C
conduction
Question 60
Conduction takes place in _________.
A
Liquid
B
solids
C
Gas
Question 61
When liquids are heated, they expand the density  _____.
A
decreases
B
Increases
Question 62
________is the transfer of heat due to the actual movement of particles.
A
Conduction
B
convection
C
Radiation
Question 63
  • Fill in the blanks
  The current produces _____ change, when it is passed through solutions.
A
chemical
B
Physical
Question 64
The device used to detect and measure electric charges is ______
A
Endoscope
B
electroscope
Question 65
The flow of current requires a _____
A
closed conducting path
B
Open Conducting Path
Question 66
Most liquids that conduct electricity are solutions of ________, ______ and ______
A
Acids, bases and salts
B
Redax, Sugar, mercury
Question 67
The process of depositing a layer of any desired metal on another material by means of electricity is called , electroplating. This process involves the principle of ______
A
Chemical effect of current
B
Physical effect of current
Question 68
The ______ of the body rises when it is heated.
A
Celcius
B
Temperature
C
forenheit
Question 69
The process by which heat is transferred without the help of any material medium is called  _______
A
Irradiation
B
Radiation
Question 70
We should not touch the live electric wire with _______ hands.
A
wet/bare
B
Dry
Question 71
The electric power used through circuits is controlled by ______
A
switches
B
Router
C
Bridges
Question 72
Flow of current requires a closed _______ path.
A
conducting
B
Reducting
Question 73
In a simple closed circuit, when the ______ is put on, the bulb glows.
A
Router
B
switch
C
Bridges
Question 74
Ina _______ circuit, each bulb is connected with the battery terminals  by separate wires.
A
parallel
B
Series
Question 75
In a parallel circuit, ______ amount of current passes through the bulbs.
A
Same
B
different
Question 76
When one of the bulbs in a parallel circuit is removed, the other bulbs will glow because they have separate_______ path.
A
conducting
B
Reducting
Question 77
Materials which do not allow electric current to pass through them are called ________
A
insulators
B
Conductors
Question 78
Positive end of a battery is known as _______
A
chemical anode
B
Physical Anode
Question 79
A substance which conducts current either as a solution or in a fused state is called an ______
A
non electrolyte
B
electrolyte
C
ion
Question 80
The process by which an electrolyte is decomposed with the help of electricity is called _________
A
electrolysis
B
Lasser
C
electroplating
Question 81
In electroplating, the metal to be coated is taken as_______
A
cathode
B
Anode
Question 82
_________ plating is used on tableware.
A
Iron
B
Metal
C
Silver
Question 83
Zinc coated iron is cGalvanizedalled ___________ iron.
A
Galvanized
B
Ungalvanized
C
Galvalume
Question 84
_______ coating prevent the corrosion of steel articles.
A
Copper
B
zinc
C
Silver
Question 85
_______ is the accumulation of electrical charges on the surface of a non-conducting material.
A
static electricity
B
Constant electricity
C
Dynamic electricity
Question 86
The proton is __________ charged.
A
Negatively
B
positively
C
Neutral
Question 87
An atom is electrically ________
A
neutral
B
Pasitive
C
Negative
Question 88
When the number of electrons is more than the number of protons, the object is said to be _________ charged.
A
negatively
B
Postively
Question 89
_______ charges repel each other.
A
like
B
Unlike
Question 90
During charging, one object loses electrons while the other ________ them.
A
Strength
B
gains
Question 91
The process of charging an object by simply touching it by a charged object is called _______
A
Reduction
B
conduction
Question 92
In the process of _________ no transfer of electrons takes place between the objects.
A
induction
B
Conduction
Question 93
An ______ is device used to detect and measure electric charges.
A
electroscope
B
Endoscope
Question 94
We can fine the nature of the charge by charging the _________ by induction.
A
gold leaf electroscope
B
Photoelectric effect
Question 95
__________ occurs because of a massive electric charge flowing from cloud to cloud.
A
Rain
B
Thundering
C
Lightning
Question 96
The lower portion of a cloud carries ________ charges
A
Neutral
B
Positive
C
negative
Question 97
In order to protect tall buildings from lightning _______ are used.
A
lightning rod
B
lightning arresters
Question 98
Heat changes the _______ of a substance.
A
temperature
B
Celcius
C
Forenheit
Question 99
Change of state occurs when substances are ________
A
heated
B
Cooled
Question 100
Heat ________ chemical action.
A
Non accelerates
B
accelerates
Question 101
Substances _______ on heating.
A
Extend
B
expand
C
Contract
Question 102
For the same amount of heat given, gases expand the _______
A
most
B
Less
C
More
Question 103
Match the following
  1. Lightning                                     a. transfer of heat
  2. Weak electric current           b. attract each other
  3. Conduction                          c. lightning arrestor
  4. Opposite charges                        d. LEDs can be used
A
4 1 2 3
B
3 4 1 2
C
2 1 4 3
D
1 3 2 4
Question 104
Match the following
  1. Large scale                                   a. series circuit
  2. small amount of current           b. hydro electricity
  3. same amount of current            c. glass
  4. good conductor                       d. cells
  5. insulator                                      e. gold
A
5 2 4 1 3
B
3 1 5 2 4
C
4 3 2 1 5
D
3 2 5 4 1
Question 105
Match the following
  1. well water                               a. Chromium plated
  2. copper sulphate solution            b. attract each other
  3. Wheel rims                             c. good conductor of electricity
  4. electric spark                  d. electrolyte
  5. unlike charges                   e. lightning
A
5 3 4 2 1
B
1 5 3 4 2
C
4 3 2 5 1
D
3 5 1 2 4
Question 106
Match the following
  1. Lightning arresters           a. solids
  2. temperature                       b. fluids
  3. conduction                       c. Benjamin Franklin
  4. liquids and gases                 d. earth connection
  5. washing machine                e. thermometer
A
5 2 1 4 3
B
3 4 1 5 2
C
1 4 3 2 5
D
1 5 2 3 4
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 106 questions to complete.
Tags
Tnpsctricks TnpsctricksAugust 15, 2018
0 187 Less than a minute
Tnpsctricks

Tnpsctricks

Leave a Reply

Your email address will not be published. Required fields are marked *

© Copyright 2024, All Rights Reserved  | 
Back to top button
error: Content is protected !!