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Showing 24 of 341 formulas Page 13 of 15

Mirror Formula

$$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$$

Relates object distance, image distance, and focal length of a spherical mirror.

📖 Physics 📚 Light - Reflection and Refraction

Magnification (Mirror)

$$m = \frac{h'}{h} = -\frac{v}{u}$$

The ratio of the height of the image to the height of the object.

📖 Physics 📚 Light - Reflection and Refraction

Refractive Index (Speed of Light)

$$n = \frac{c}{v}$$

Ratio of the speed of light in vacuum to the speed of light in a specific medium.

📖 Physics 📚 Light - Reflection and Refraction

Electric Current

$$I = \frac{Q}{t}$$

The rate of flow of electric charge through a conductor.

📖 Physics 📚 Electricity

Potential Difference

$$V = \frac{W}{Q}$$

Work done to move a unit charge from one point to another.

📖 Physics 📚 Electricity

Resistivity

$$R = \rho \frac{l}{A}$$

Resistance depends on the material, length, and area of the conductor.

📖 Physics 📚 Electricity

Joule's Law of Heating

Heat produced in a resistor is proportional to square of current, resistance, and time.

📖 Physics 📚 Electricity

Electrical Energy

$$E = P \times t$$

Total energy used over a period of time.

📖 Physics 📚 Electricity

Speed

$$v = \frac{s}{t}$$

Rate of change of distance.

📖 Physics 📚 Motion

Acceleration

$$a = \frac{v - u}{t}$$

Rate of change of velocity with respect to time.

📖 Physics 📚 Motion

Weight

Force with which Earth attracts an object.

📖 Physics 📚 Gravitation

Pressure

$$P = \frac{F}{A}$$

Force acting per unit area.

📖 Physics 📚 Gravitation

Frequency (Wave)

$$f = \frac{1}{T}$$

Number of oscillations per unit time.

📖 Physics 📚 Sound

Magnification (Lens)

$$m = \frac{h'}{h} = \frac{v}{u}$$

Linear magnification produced by a lens.

📖 Physics 📚 Light - Reflection and Refraction

First Equation of Motion

Relates final velocity, initial velocity, acceleration, and time.

📖 Physics 📚 Motion

Second Equation of Motion

$$s = ut + \frac{1}{2}at^2$$

Relates displacement, initial velocity, time, and acceleration.

📖 Physics 📚 Motion

Third Equation of Motion

$$v^2 = u^2 + 2as$$

Relates final velocity, initial velocity, acceleration, and displacement.

📖 Physics 📚 Motion

Universal Law of Gravitation

$$F = G \frac{m_1 m_2}{r^2}$$

Force of attraction between two masses.

📖 Physics 📚 Gravitation

Buoyant Force (Archimedes)

$$F_b = V \rho g$$

Upward force on an object immersed in a fluid.

📖 Physics 📚 Gravitation

Mechanical Power

$$P = \frac{W}{t}$$

Rate of doing work.

📖 Physics 📚 Work and Energy

Snell's Law (Simplified)

$$n = \frac{\sin i}{\sin r}$$

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media.

📖 Physics 📚 Light - Reflection and Refraction

Relative Density

$$R.D. = \frac{\rho_{\text{substance}}}{\rho_{\text{water}}}$$

Ratio of density of a substance to the density of water.

📖 Physics 📚 Gravitation

Radius of Curvature

Radius of curvature is twice the focal length for spherical mirrors.

📖 Physics 📚 Light - Reflection and Refraction

Average Speed

$$v_{avg} = \frac{\text{Total Distance}}{\text{Total Time}}$$

Total distance traveled divided by the total time taken.

📖 Physics 📚 Motion

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