Science · X-Factor Notes
MEASUREMENT/UNIT revision notes for UPPCS Prelims.
24 revision facts
| Concept | What to remember | Asked in UPPCS |
|---|---|---|
| Power (Unit) | The SI unit of power is watt (W). Power is the rate of doing work or transferring energy. | U.P.P.S.C. (GIC) 2010 |
| Electric Current (Unit) | The unit of electric current is Ampere. | U.P. U.D.A./L.D.A. (Pre) 2013 |
| Work Done (Unit) | The SI unit of work is joule. | UPPCS (Pre) 2005; U.P. U.D.A./L.D.A. (Pre) 2001; UPPCS (Pre) 1990 |
| Acceleration (Unit) | The SI unit of acceleration is metre per second square (m/s2). | UPPCS (Pre) 2005; U.P. U.D.A./L.D.A. (Pre) 2001 |
| Force (Unit) | The SI unit of force is newton (N). | UPPCS (Pre) 2005; U.P. U.D.A./L.D.A. (Pre) 2001 |
| Impulse (Unit) | The SI unit of impulse is newton second (Ns). | UPPCS (Pre) 2005; U.P. U.D.A./L.D.A. (Pre) 2001 |
| Electric Potential (Unit) | Volt is the unit of electric potential. | UPPCS (Pre) 1990 |
| Pressure (SI Unit/Mismatch) | The SI unit of pressure is Pascal. Dyne is the unit of force in the CGS system. | U.P. Lower Sub. (Pre) 2013 |
| Radioactivity (Unit) | The SI unit of radioactivity is becquerel (Bq). | U.P. P.C.S. (Pre) 2022 |
| Concept | What to remember | Asked in UPPCS |
|---|---|---|
| Light-year | A unit of astronomical distance used to express lengths. It is the distance light travels in vacuum in one year. | U.P. U.D.A./L.D.A. (Pre) 2013; U.P. Lower Sub. (Mains) 2013; U.P. U.D.A./L.D.A. (Pre) 2010 |
| Parsec | A unit of distance used to measure astronomically large distances beyond the solar system. 1 Parsec = ~3.262 light-years. | UPPCS (Pre) 1997 |
| Fermimetre (Fermi) | The smallest unit of length among choices like micron, nanometre, and Angstrom(10-10m); 1 Fermi = 10-15metre. | UPPCS (Pre) 2005 |
| Micron (Micrometre) | Previous name for micrometre. 1 micron = 10-6 m. Represents a length of 10-4 cm. | UPPCS (Mains) 2011 |
| Nanometre | 1 nanometre = 10-9metre, which is equivalent to 10-7 cm. | U.P. U.D.A./L.D.A. (Pre) 2013 |
| Length Conversion (cm to inches) | To convert length from centimetre to inches, multiply the measurement by 0.39 (since 1 cm = 0.39 inch). | U.P. U.D.A./L.D.A. (Pre) 2010 |
| Concept | What to remember | Asked in UPPCS |
|---|---|---|
| Nautical Mile | A unit of distance utilized by navigators in the sea. | U.P. U.D.A./L.D.A. (Pre) 2002 |
| Knot | Unit of measurement for the speed of a ship | U.P. U.D.A./L.D.A. (Pre) 2002 |
| Calorie | A unit used for measuring heat and energy. | U.P. U.D.A./L.D.A. (Pre) 2002 |
| Oil Barrel | 1 barrel of oil is equivalent to approximately 159 litre. | UPPCS (Pre) 2009 |
| Cusec | Measures the flow rate of water; abbreviation for 'cubic feet per second'. | U.P. Lower Sub. (Spl.) (Pre) 2008 |
| Byte | A unit of digital information in computing that consists of eight bits. | U.P. Lower Sub. (Spl.) (Pre) 2008 |
| Richter Scale | Quantifies the intensity or energy released by an earthquake. | U.P. Lower Sub. (Spl.) (Pre) 2008 |
| Bar | A metric (non-SI) unit of pressure. | U.P. Lower Sub. (Spl.) (Pre) 2008 |
| Pikogram | A small unit of mass: 1 Pikogram = 10-12 gram. | N/A |
