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Electricity and Energy

Winmeen WinmeenSeptember 2, 2018
0 99 Less than a minute

Electricity and Energy

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Question 1
Electric current is defined as the rate of flow of________
A
energy
B
power
C
mass
D
charges
Question 2
Electric charge is expressed in ________
A
Volt
B
Joule
C
Coulomb
D
Ohm
Question 3
The unit of electric current is ______
A
ampere
B
volt
C
watt
D
kilo-watt
Question 4
Which instrument is used to measure current?
A
voltmeter
B
ammeter
C
galvanometer
D
ohmmeter
Question 5
The amount of work done to move a unit charge from one point to the other is _______
A
resistance
B
current
C
potential
D
none of the above
Question 6
Which quantity is measures by voltmeter?
A
current
B
potential
C
resistance
D
capacitance
Question 7
Ohm’s law gives the relation between potential difference and ______
A
emf
B
temperature
C
resistance
D
current
Question 8
In an electrical circuit, voltmeter reads 24V and ammeter reads 6A. the value of resistance is _________
A
40Ω
B
2 Ω
C
0.25 Ω
D
4 Ω
Question 9
Ohm is also expressed as _________
A
volt/ampere
B
volt/coulomb
C
newton
D
none
Question 10
Which property of a body oppose the flow of electric charge through it?
A
potential
B
resistance
C
temperature
D
none
Question 11
When more than one resistors are in series, which quantity remains the term?
A
Current
B
Potential difference
C
Resistance
D
Power
Question 12
To increase resistance, one should use combination of resistors in _______
A
series
B
parallel
C
series and parallel
D
series always
Question 13
Which quantity remains the same when resistors are connected in parallel?
A
current
B
potential difference
C
emf
D
resistance
Question 14
1 Joule / 1 coulomb______
A
1 watt
B
1 kwh
C
1 volt
D
1 ampere
Question 15
When a resistance of 6Ω is connected with a cell of electromotive force 1.5V, the current flowing through the cell is ________
A
2A
B
0.25A
C
0.5A
D
9A
Question 16
Three resistances 2 Ω, 2 Ω and 2 Ω are connected in parallel with each other. The effective resistance is _______
A
1.5 Ω
B
0.66 Ω
C
6 Ω
D
0.75 Ω
Question 17
The value of current flowing through a circuit consisting of two resistances 6 Ω and 18 Ω in series with a battery of 3 Ω is______
A
0.5A
B
0.125A
C
6A
D
0.25A
Question 18
Which of the following is used to measure potential difference?
A
ammeter
B
galvanometer
C
voltmeter
D
wattmeter
Question 19
The work done in moving a charge of 10c through two points having potential difference of 5V is________
A
100J
B
50J
C
5J
D
250J
Question 20
The commonly used safely fuse wire is made of_______
A
nickel
B
lead
C
an alloy of tin and lead
D
copper
Question 21
According to international convention of colour coding in a wire______
A
live is red, neutral is black
B
live is red, neutral is green
C
live is brown, neutral is blue
D
live is green, neutral is black
Question 22
Kilowatt-hour is the unit of _______
A
potential difference
B
electric power
C
electrical energy
D
charge
Question 23
Name the physical quantity which is measured in KW____
A
electric energy
B
electric power
C
electric current
D
electric potential
Question 24
Negatively and positively charged ions which are free to move constitute a current___________
A
In conductors
B
In an electrolytes
C
In metals
D
In liquids
Question 25
Who built the first battery?
A
Lechlanche
B
Daniel
C
Volta
D
Edison
Question 26
In cells, chemical energy is converted into ______
A
mechanical energy
B
heat energy
C
sound energy
D
electrical energy
Question 27
The emf generated in voltaic cell is ________
A
1.5 V
B
2V
C
1.08V
D
2.2V
Question 28
In ________ positively and negatively charged ions that are free to move constitute an electric current.
A
conductors
B
metals
C
liquids
D
electrolyte
Question 29
The emf 1.5V is produced by _____
A
Daniel cell
B
Voltaic cell
C
Lechlanche
D
Lead acid accumulator
Question 30
Which of the following is not a primary cell?
A
Daniel cell
B
Lechlanche
C
Lead acid accumulator
D
none
Question 31
Which of these is not a feature of Daniel cell?
A
Copper vessel
B
Zinc rod
C
Copper sulphate solution
D
Carbon rod
Question 32
Charging is a process of reproducing ________
A
active materials
B
current
C
voltage
D
power
Question 33
The emf obtained from secondary cell is ______
A
1.08V
B
1.5V
C
2.2 V
D
1.2 V
Question 34
A good fuel should _______
A
provide large amount of energy
B
be easily accessible
C
be easy to store and transport
D
all the above
Question 35
Which of the following is non-renewable source of energy?
A
Coal
B
Sun
C
Gobar gas
D
Tides
Question 36
The change that extracts electric current from a secondary cell is _____
A
charging
B
electrostatic induction
C
electromagnetic induction
D
discharging
Question 37
Which of the following is formed under the earth over millions of years?
A
coal
B
petroleum
C
natural gas
D
all the above
Question 38
Choose the source of energy which is different from others ________
A
wood
B
falling water
C
wind
D
petroleum
Question 39
In a thermal power plant, energy of ______ is used.
A
blowing wind
B
burning fuel
C
flowing water
D
breaking of heavy atom
Question 40
Energy of flowing water is use in a _________
A
wave energy plant
B
thermal power plant
C
hydro power plant
D
nuclear power plant
Question 41
Hydro power plants generate _______
A
nuclear energy
B
thermal energy
C
electrical energy
D
wind energy
Question 42
In hydro power plants_______ is converted into electrical energy.
A
potential energy
B
kinetic energy
C
nuclear energy
D
thermal energy
Question 43
A wind mill converts __________ into electrical energy.
A
potential energy
B
kinetic energy
C
sound energy
D
thermal energy
Question 44
To maintain the required speed of the turbine, the speed of the wind should be _______
A
higher than 15 km per hour
B
higher than 15 km per second
C
lesser than 15 km per hour
D
lesser than 15 m per second
Question 45
Which of the following is renewable source of energy?
A
wood
B
wind
C
flowing water
D
all the above
Question 46
When a blackened plate is placed in sunlight, its temperature will______
A
decrease continuously
B
increase continuously
C
increase for some time and then remains constant
D
remains constant
Question 47
Pollution can be minimised when food is cooked _________
A
burning of coal
B
burning of cooking gas
C
burning of wood
D
using a solar cooker
Question 48
Ultimate source of all renewable energy on earth_______
A
wind
B
Petroleum
C
Sun
D
Coal
Question 49
Which statement is incorrect about a solar cooker?
A
it causes no pollution
B
Nutrients of food are not destroyed
C
Use of solar cooker for cooking food saves fuel
D
It can cook the food at any time
Question 50
Which of the following converts solar energy directly into electricity?
A
Solar cooker
B
Solar water heater
C
Solar cell
D
Solar dryer
Question 51
The source of Sun’s energy is ______
A
burning of hydrogen
B
solar flares
C
nuclear fusion
D
combustion of coal present in its crust
Question 52
Which sources of energy are not related to energy of Sun?
A
Wave energy
B
nuclear energy
C
Tidal energy
D
Wind energy
Question 53
The process of splitting heavy atom into lighter nuclei is ______
A
nuclear fission
B
nuclear fusion
C
nuclear reaction
D
radioactivity
Question 54
In nuclear reactor energy is released due to _________
A
controlled nuclear fusion
B
uncontrolled nuclear fusion
C
controlled nuclear fusion
D
uncontrolled nuclear fission
Question 55
The phenomenon of radioactivity is discovered by ________
A
Marie Curie
B
Rutherford
C
Roentgen
D
Hentry Becquerel
Question 56
Marie Curie and Pierre Curie discovered _________
A
radioactive elements
B
X-ray
C
. γ – ray
D
radioactivity
Question 57
The radiations emitted by natural radioactive elements________
A
IR rays
B
UV rays
C
X-rays
D
α,β,γ rays
Question 58
The radioactive phenomenon is not affected by ________
A
temperature
B
pressure
C
electric and magnetic fields
D
all the above
Question 59
Who discovered nuclear fission?
A
Henri Becqueral
B
Otto Hahn and Strass man
C
Marie and Pierre Curie
D
Roentgen
Question 60
Nuclear fusion is a process of _________
A
breaking of heavy atom
B
combining heavy nuclei
C
combining lighter nuclei
D
breaking of light atom
Question 61
The fusion reactions occur at ________
A
low pressures
B
low temperatures
C
extremely high temperature
D
high pressure
Question 62
The nuclear fusion reaction is known as ________
A
thermo nuclear reaction
B
chemical reaction
C
physical reaction
D
chain reaction
Question 63
A hydrogen bomb is an example for an ______
A
controlled nuclear fission
B
uncontrolled nuclear fission
C
controlled nuclear fusion
D
uncontrolled nuclear fusion
Question 64
An uncontrolled fission reaction takes place in an _______
A
atom bomb
B
hydrogen bomb
C
nuclear reactor
D
sun
Question 65
The measure of the departure of a reactor from critically is called ______
A
Roentgen
B
nuclear reactivity
C
curie
D
nuclear activity
Question 66
Roentgen is the unit of ______
A
nuclear activity
B
radiation exposure
C
intensity of radiation
D
speed of nuclear reaction
Question 67
The safe limit of receiving the radiation is ________
A
250mR per week
B
250 R per week
C
i 250mR per day
D
500mR per week
Question 68
Radioactive materials are kept in ______
A
thin walled lead container
B
thick walled copper container
C
thin walled aluminium container
D
thick walled lead container
Question 69
To check the safety limit of radiation _______ is worm
A
lead aprons
B
lead gloves
C
small micro film badge
D
none of these
Question 70
Energy available from the oceans is _____
A
tidal energy
B
wave energy
C
ocean thermal film badge
D
all the above
Question 71
The energy available due to the difference in the temperature of water at the surface of  the ocean and at deeper levels is called ________
A
tidal energy
B
wind energy
C
solar energy
D
ocean thermal energy
Question 72
Tidal energy is due to gravitational pull of ________
A
moon
B
earth
C
sun
D
mars
Question 73
The difference in sea levels gives ________
A
wind energy
B
wave energy
C
tidal energy
D
OTE
Question 74
Which of  the following pair of energy does not create pollution?
A
Solar energy and biogas
B
Solar energy and wind energy
C
Tidal energy and coal
D
Natural gas and bio mass
Question 75
The renewable source of energy is_________
A
tidal energy
B
coal
C
petroleum
D
natural gas
Question 76
Tidal energy is harnessed by constructing _______
A
dams
B
wind mill
C
biomass unit
D
geothermal unit
Question 77
What is the amount of current, when 20C of charges flows in 4S through a conductor? [I= q/t]
A
5A
B
80A
C
4A
D
2A
Question 78
. The symbol of Ammeter is _________
A
V
B
A
C
G
D
I
Question 79
The main source of bio-mass energy is ________
A
coal
B
heat energy
C
thermal energy
D
cow-dung
Question 80
The potential difference required to pass a current 0.2A in a wire of resistance 20 ohm is _________
A
100V
B
4 V
C
0.01V
D
40V
Question 81
Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in these are in the ratio _________
A
2:1
B
1:2
C
4:1
D
1:1
Question 82
Kilowatt-hour is the unit of _______
A
potential difference
B
electric power
C
electric energy
D
charge
Question 83
________surface absorbs more heat than any other surface under identical conditions
A
White
B
Rough
C
Black
D
Yellow
Question 84
The atomic number of natural radioactive element is __________
A
greater than 82
B
less than 82
C
not defined
D
at least 92
Question 85
Which one of the following statements does not represents Ohm’s law?
A
current/potential difference = constant
B
potential difference/ current = constant
C
current = resistance x potential difference
Question 86
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A
B
B
C
C
D
D
Question 87
A
A
B
B
C
C
D
D
Question 88
A
A
B
B
C
C
D
D
Question 89
A
A
B
B
C
C
D
D
Question 90
A
A
B
B
C
C
D
D
Question 91
A
A
B
B
C
C
D
D
Question 92
A
A
B
B
C
C
D
D
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There are 92 questions to complete.
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Winmeen WinmeenSeptember 2, 2018
0 99 Less than a minute
Winmeen

Winmeen

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