INTERNATIONAL SYSTEM OF UNITS (SI)
International System of Units (SI)
چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
وزن ______ میں ناپا جاتا ہے؟
- Kilograms
- Grams
- Newtons
- Pounds
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
- Weight is a force.
- The unit of measurement for force is the Newton (N).
شور کی آلودگی/شدت ______ میں ماپا جاتا ہے؟
- Decibels (dB)
- Hertz (Hz)
- Watts (W)
- Meters (m)
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Noise pollution/intensity is measured in decibels (dB), which quantifies sound level or loudness.Higher decibel levels indicate louder noise, with prolonged exposure above 85 dB potentially causing hearing damage.
زہر کی پیمائش کی اکائی کیا ہے؟
- Joule
- Radian
- Milligram
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Poison dosage is measured in milligrams (mg) based on body weight.
Even a small variation in mg can determine whether a substance is safe or toxic.
- Newton
- Joule
- Watt
- Metre
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The SI unit of force is the Newton, symbol N.
The base units relevant to force are:
- The metre, unit of length — symbol m
- The kilogram, unit of mass — symbol kg
- The second, unit of time — symbol s
بجلی کے خلاف مزاحمت کا ایس آئی یونٹ _____ ہے؟
- Volts (V)
- Ohms (Ω)
- Amps (A)
- Watts (W)
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The SI unit of electric resistance is the ohm (Ω).
1 Ω = 1 V/A.
while
The SI unit of resistivity is an ohm-meter.
برقی چارج کس کی اکائی میں ماپا جاتا ہے؟
- Ohm
- Coloumb
- Ampere
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The SI unit of electric charge is the coulomb, represented by the symbol C.
One coulomb is the amount of charge that passes through a conductor carrying one ampere of current for one second.
It's also equal to the charge of about 6.24 quintillion electrons or protons.
ایک کلو واٹ گھنٹہ _____ کی اکائی ہے؟
- Power
- Energy
- Energy/time
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
A kilowatt hour (kWh) measures the amount of energy consumed when 1 kilowatt of power is used for 1 hour.
It is a unit of electrical energy.
Kilowatt hour is the unit of ENERGY.
Watt or Kilowatt is the unit of POWER.
برقی رو کی ایس۔آئی یونٹ _____ ہے؟
- Ampere
- Volt
- Coloumb
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The ampere, symbol A, is the SI unit of electric current.
It is defined by considering the fixed value of the elementary charge e as 1.602 176 634 x 1019,
where the unit C is equal to As and the second is defined by Δν Cs.
ٹارق (مومینٹ) کا ایس آئی یونٹ کیا ہے؟
- Nm
- N/m
- N
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Unit of torque: newton metre (N m)
Torque is a vector quantity.
The direction of the torque vector depends on the direction of the force on the axis

ریڈیو ایکٹیویٹی کی اکائی ہے۔
- Electron volt
- Electron ampere
- Becquerel
- D. MV
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The SI unit of radioactivity is becquerel (Bq).
Curie is a non-SI unit, with 1 curie equal to 37 billion Bq.
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration)
It is the process by which an unstable atomic nucleus loses energy by radiation.
Three of the most common types of decay are: