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Beschreibung
Quiz von Maheen Zahid, aktualisiert more than 1 year ago
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Erstellt von Maheen Zahid
vor fast 9 Jahre
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Frage 1
Frage
A chemical reaction takes place when water is put to a boil passing electricity through a heater immersed in the water.
Antworten
- True
- False
Frage 2
Frage
during a chemical reaction, energy:
Antworten
-
is taken in
-
is given out
-
remains the same
Frage 3
Frage
When reactants are mixed,energy is used for ______ the molecules of the reactants into ________
Antworten
-
breaking up.....into atoms
-
combining...into compounds
-
absorbing....into atoms
Frage 4
Frage
the atoms ____ themselves to form the products
Antworten
-
rearrange
-
recombine
-
break
-
divide
Frage 5
Frage
If the amount of energy required to break the atoms up is 250 and the the amount of energy released when atoms recombine is 300,what is the amount of energy exchanged with the surroundings?
Antworten
-
50
-
550
-
300
-
250
Frage 6
Frage
A chemical reaction is used to describe a chemical equation
Antworten
- True
- False
Frage 7
Frage
No atoms are created or destroyed in a chemical reaction
Antworten
- True
- False
Frage 8
Frage
At room temperature gold is _____,water is _____ and oxygen is ________
Antworten
-
solid...liquid...gas
-
gas...liquid...solid
-
liquid....gas...solid
-
liquid...solid...gas
Frage 9
Frage
Atoms and molecules are said to be in a constant______
Antworten
-
motion
-
arrangement
-
order
-
state
Frage 10
Frage
in a solid the atoms are:
Antworten
-
packed closely together in a regular pattern
-
move around eachother
-
held and spun around in fixed positions
-
have weak attractive forces
-
have strong attractive forces
-
have a definite shape and volume
-
does not have a fixed volume
Frage 11
Frage
If a solid is heated the particles_____________________________________________________
Antworten
-
gain energy and start to vibrate more
-
slow down
-
break down
-
combine
Frage 12
Frage
in a liquid the atoms are arranged in a fixed pattern
Antworten
- True
- False
Frage 13
Frage
liquids can flow because:
Antworten
-
they have fixed atoms
-
they can move around one another
-
they are closely packed
-
they have strong attractive forces
Frage 14
Frage
in a gas the atoms are:
Antworten
-
widely spaced and move freely
-
able to fill up any container quickly
-
slow
-
combined together
Frage 15
Frage
solid to gas is the process of ________
Antworten
-
boiling
-
sublimation
-
freezing
Frage 16
Frage
electricity is produced by flow of
Antworten
-
electric charges
-
electric current
-
atoms
-
energy
Frage 17
Frage
conventional current is the flow of electric charges from the _______ end to the ________ end
Antworten
-
positive.....to negative
-
negative.....to positive
Frage 18
Frage
Electric current is defined as:
Antworten
-
the rate of flow of electric charges
-
the rate of flow of electric current
-
the rate of flow of electricity
Frage 19
Frage
the SI unit for electricity is ampere (A)
Antworten
- True
- False
Frage 20
Frage
electric currents are measured by
Antworten
-
ammeters
-
voltmeters
-
generators
-
cellphones
Frage 21
Frage
Ammeters must be connected in parallel
Antworten
- True
- False
Frage 22
Frage
ammeter may get damaged if
Antworten
-
connected the other way round
-
connected in parallel
-
connected from positive to negative
-
connected in series
Frage 23
Frage
electric circuits can be divided into two main categories:
Antworten
-
series and parallel
-
ammeter and voltmeter
-
electric charges and electric current
Frage 24
Frage
An electric circuit is a path along which electric charges move
Antworten
- True
- False
Frage 25
Frage
A series circuit forms a double loop
Antworten
- True
- False
Frage 26
Frage
the current flowing through each electrical component in a series circuit is _____
Antworten
-
same
-
different
-
opposite
Frage 27
Frage
disadvantage of series circuit is that there is less current flowing in each branch rather than that flowing out of the circuit
Antworten
- True
- False
Frage 28
Frage
what is a parallel circuit?
Antworten
-
A circuit that splits into two or more branches
-
A circuit that forms a single loop
-
A circuit with multiple batteries
-
A colorful circuit with balloons
Frage 29
Frage
Advantage of Parallel circuit is that the current flowing through each component is same.
Antworten
- True
- False
Frage 30
Frage
A source is
Antworten
-
a battery
-
component from the where the current starts
-
wires and bulbs in a circuit are a part of the source
Frage 31
Frage
the force needed to push electric charges round a circuit is supplied by:
Antworten
-
a battery
-
an electric cell
-
a bulb
-
a toy
Frage 32
Frage
the amount of energy supplied by a source of electrical energy to each unit of electric charge is called ________
Antworten
-
voltage
-
power
-
Resistance
Frage 33
Frage
If more electric cells are connected in series,a ________ voltage will be obtained
Antworten
-
higher
-
lower
-
decreased
Frage 34
Frage
Electrical energy is converted into light and heat when flowing through a bulb
Antworten
- True
- False
Frage 35
Frage
SI unit of voltage is ______
Antworten
-
volt (V)
-
Joules
-
ohm
Frage 36
Frage
The voltage of a source of electrical energy is called
Antworten
-
electromotive force
-
potential difference
-
energy
-
cupcake
Frage 37
Frage
Resistors can only be added in series.
Antworten
- True
- False
Frage 38
Frage
which of the following have heating elements inside them?
Antworten
-
hair dryer
-
cellphone
-
cranes
-
toaster
-
iron
-
magnet
Frage 39
Frage
The heating element is usually made up of ________________
Antworten
-
nichrome wire
-
conductor
-
plastic
-
coiled coil
Frage 40
Frage
In electro-plating the plating metal is connected to the __________ terminal
Antworten
-
positive
-
negative
Frage 41
Frage
which of the following are uses of electromagnets
Antworten
-
used in scrapyards
-
check thickness of paint in a car
-
televisions
-
kettle
-
remove splinters from body
Frage 42
Frage
improper use of electricity can result in:
Antworten
-
electrocutions
-
electric fires
-
electric shocks
-
dehydration
-
high blood pressure
Frage 43
Frage
The consumer unit consists of damp conditions,main switch and electric bells.
Antworten
- True
- False
Frage 44
Frage
some dangerous situations of using electricity are:
Antworten
-
damp conditions
-
damaged insulation
-
over-loading
-
sleeping near it
-
sitting on it
Frage 45
Frage
If it takes a 4kW kettle 10 minutes to boil the water in it,how much energy is used?
Calculate the cost of electricity if each unit costs 21 cents.
Antworten
-
2/3 kW and 14 cents
-
1/3 kW and 6 cents
-
1/2 kW and 21 cents
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