INTERNATIONAL SYSTEM OF UNITS (SI)
International System of Units (SI)
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
گرمی کا ایس آئی یونٹ _____ ہے؟
Watt
Volt
Joule
None of these
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Explanation
The SI unit of heat is the joule (J).
Heat is a form of energy.
The joule is the standard unit for energy in the International System of Units (SI).
For instance, 1 joule of heat is the energy required to raise the temperature of 1 gram of water by 0.24°C.
ایک نوری سال کا تعلق ____ سے ہے؟
Time
Distance
Frequency
None of these
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Explanation
Light year refers to speed of light expressed in miles per year
(it is about ten trillion kilometers or six trillion miles ).
Light year is a unit of distance .
Light Year: the distance that light can travel in one year.
The distance light travels in one year is known as the light year.
1 light year is equal to 9.5 x 10^12 km
1
5
3
7
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Explanation
The seven SI base units are:
1. Meter (m) – for length
2. Kilogram (kg) – for mass
3. Second (s) – for time
4. Ampere (A) – for electric current
5. Kelvin (K) – for temperature
6. Mole (mol) – for amount of substance
7. Candela (cd) – for luminous intensity
Newton (N)
Joule (J)
Pascal (Pa)
Watt (W)
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Explanation
The SI unit of stress is Pascal (Pa).
1 Pascal = 1 Newton / meter² (N/m²)
Stress = Force / Area
→ Units: N / m² = Pa
\"چاندی\" کی کیمیائی علامت کیا ہے؟
Ag
Mg
O
Z
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Explanation
Silver is a chemical element with the symbol Ag
and atomic number 47
Atomic radius : empirical: 144 pm
Crystal structure : face-centered cubic (fcc)
ND5-07-2023
حجم کی ایس آئی یونٹ _____ ہے؟
m³
m²
n²
None of these
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Explanation
The SI unit of volume is the cubic meter (m3), which is a derived unit.
1 m3 = 1 m • 1 m • 1 m.
***
The SI unit of energy/work is the joule (J)
The SI unit of charge is Coulomb
The Pascal is the SI-derived unit of pressure
The ampere, symbol A , is the SI unit of electric current.
The SI unit of power is the watt, one joule per second.
The SI unit of electric resistance is the ohm (Ω).
The SI unit of temperature as per the International System of Units is Kelvin
Unit of torque: newton metre ( N m )
The SI unit of velocity is a meter per second (m/s).
The SI unit of acceleration is meters/second2 (m/s2)
Pa.s
Nm
Kg
None
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Explanation
The SI unit of viscosity is the pascal second (Pa·s) or kg·m−1·s−1.
Common symbols: η, μ
Derivations from other quantities: μ = G·t
ایس آئی سسٹم میں برائٹ شدت کی اکائی _____ ہے؟
Lumen (lm)
Watt (W)
Candela (cd)
Lux (lx)
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Explanation
The Candela (cd) is the SI unit of luminous intensity. It is defined as the luminous intensity of a monochromatic source that emits light at a frequency of 540 x 10^12 Hz with a luminous efficiency of 683 lm/W.
ایس آئی یونٹوں میں ، طول موج کی اکائی ______ ہے؟
kg (Kilogram)
A (Ampere)
m (Meter)
None of these
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Explanation
Wavelength is a measure of distance between two wave crests or troughs.
The SI unit for measuring distance is the meter (m), hence it is used for wavelength .
It is typically denoted by the symbol λ (lambda).
rad/s
rad/s²
m/s
N·m
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Explanation
The standard unit for angular velocity is radians per second (rad/s).
Dimensional formula Angular velocity is [T]⁻¹
The SI unit of velocity is a ms^-1 and m/s.
