^Electric cell
Electric cell
It neither creates nor destroys charge, whereas it just maintains the potential difference & organized flow of charge by supplying energy.
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^Connecting or disconnecting battery
Connecting or disconnecting battery
On disconnecting the battery charge remains constant & if the battery remains connected then potential difference across the capacitor remains constant. Using the above fact the effect of inserting a dielectric slab between plates of a capacitor can be expressed by the following table:
^Light year (ly)
^Light year (ly)
It is the distance travelled by light in vacuum (with a speed of 3 x 108 m/s) in one year
(i.e., 365 x 24 x 60 x 60 s).
1 ly = 3 x 108 x (365 x 24 x 60 x 60) » 9.5 x 1015 m
*Some SI Derived units with special names
*Some SI Derived units with special names
| Quantity | SI unit | Symbol |
| Force | newton | N |
| Work | joule | J |
| Pressure, Stress | pascal | Pa |
| watt | W | |
| Angle | radian | rad |
| Frequency | hertz | Hz |
| Viscosity | poiseuille | Pl |
| Torque | newton meter | Nm |
| Electric charge | coulomb | C |
| Electrical resistance | ohm | W |
| Voltage | volt | V |
| Flux (Elec. or mag) | weber | Wb |
| Inductance | henry | H |
| Capacitance | farad | F |
| Magnetic field | tesla | T |
| Illuminance | lux | Lx |
| Luminous flux | Lumen | lm |
| Illuminance | lux | lx |
| Activity (radioactive) | Becquerel | Bq |
| Absorbed dose index | Gray | Gy |
*Point slope form
*Point slope form
Equation of a straight line having slope m and passing through a point A (x1, y1) is 
2 point form
Equation of a straight line passing through two point A (x1, y1) and B (x2, y2) is 
*Determinants of 3rd order
*Determinants of 3rd order
*Property of supplementary angles.
*Property of supplementary angles.
If α + β = 1800, then:
sinα= sinβ,cosα = -cosβ & tanα= – tanβ
>Trigonometric series
>Trigonometric series
^A long horizontal fixed wire carries a current of 100 A. Directly above and parallel to it is another wire carrying a current of 20 A and weighing 0.04 N/m.
^A long horizontal fixed wire carries a current of 100 A. Directly above and parallel to it is another wire carrying a current of 20 A and weighing 0.04 N/m. The separation between the two wires so that the upper wire is just supported by the magnetic repulsion is
