Some important physics units - PHYSICS DEVICES AND ITS USES

Physics Is The Study Of Nature 

Some important physics units

Measurement	Units
Temperature	Kelvin
Velocity	m/s
Heat	joule
Charge	Coulomb
Potential	volts
Electric power	watt
Resistance	Ohm
1Horse power	746 watts
1 Kilowatt	1.34 horsepower

 PHYSICS DEVICES AND ITS USES

S.No	Device	Uses
1.	Astronomical telescope	To view distant stars and planets.
2.	Barometer	To measure atmospheric pressure.
3.	Compression spring balance	To find the weight of a person.
4.	Common balance	To measure the mass of a body.
5.	Dry cell	Widely used in radios, torch lights etc.
6.	Density bottle	To determine the relative density or specific gravity of liquids.
7.	Sonometer	To measure the frequency of a tuning fork.
8.	Vernier callipers	To measure length accurately.
9.	Altimeter	Used in aircraft to measure altitudes.
10.	Thermometer	To measure the temperature of the human body.
11.	Periscope	Used in submarines to see objects on the surface of water.
12.	Hydrometer	To determine the specific gravity of liquids.
13.	Calorimeter	To measure quantities of heat.
14.	Screw gauge	To measure the thickness of a thin glass plate and the diameter of a thin wire or a small sphere.
15.	Ammeter	To measure current in amperes.
16.	Voltmeter	To measure the potential difference in volts.
17.	Resistance	Opposes the flow of electrons through the conductors.
18.	Rheostat	Used to regulate the value of a current in a circuit .
19.	Transformer	A device that either increases or decreases the magnitude of an alternating voltage.
20.	Diodes	Used in rectifier circuits.
21.	Terrestrial telescope	To view distant objects on Earth.
22.	Simple pendulum	To determine the g value.
23.	Electric motor	A device that converts electrical energy into mechanical energy.
24.	Transistor	Used to stabilize power supplies.