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1 According to Einstein's energy mass relation, one kg of mass actually has energy
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9x10^15 J
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9x10^16 J
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9x10^8 J
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9x10^18 J
Correct!Wrong!
9x10^16 J
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2 The ratio of 1 nanometer to 1 attometer
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10^9
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10^8
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10^-9
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10^-18
Correct!Wrong!
10^9
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3 Light year is the unit of
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Energy
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Mass
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Time
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Distance
Correct!Wrong!Distance
Light year is the distance travelled by light in one year.
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4 Which of the following system of units is not based on units of mass, length and time alone?
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FPS
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SI
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CGS
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MKS
Correct!Wrong!SI System
System international (SI) of units based on seven base units, not only on mass, length and time.
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5 Which of the following is not a unit of energy?
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kilowatt
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erg
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joule
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kilowatt hour
Correct!Wrong!kilowatt
kilowatt is the unit of power not of energy, while other three units are used as units of energy.
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6 Which of the following is not a base quantity?
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Length
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Mass
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TIme
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None of these
Correct!Wrong!None of these
All three given quantities are base quantities.
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7 Which one of the following is not assignable error?
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Personal error
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Random error
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Systematic error
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None of these
Correct!Wrong!Random Error
Random error can be stated as:-
An error in measurement caused by factors which vary from one measurement to another.
As this error has not any specific reason or values, so its value cannot be assigned in any calculations.
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8 Which of the following is not unit of length?
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Yard
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Angstron
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Hand
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Slug
Correct!Wrong!Slug
Slug is unit of mass.
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9 Steradian is the unit of :-
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Plane angle
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Solid angle
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Base quantities
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Derived quantities
Correct!Wrong!Solid angle
The steradian or square radian is the SI unit of solid angle. It is used in three-dimensional geometry, and is analogous to the radian.
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10 Which of the following quantities that can be expressed in terms of just two different SI base units.
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Charge
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Area
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Volume
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Force
Correct!Wrong!Charge
Q=Ixt
charge=(current)x(time)
units:
columb=(ampere)x(second)
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PHYSICS XI Ch#1 Quiz 1
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