Question

all formulas used in electricity chapter class 10 science

Answer 1

QuantityFormulasUnit Current I I = Q / t

Q = Charge

t = time taken

 Amperes (A) Voltage VV = E / Q

or

V = W / Q

E = Energy, W = Work done

 Volts (V) Resistance R R = ρl / A

ρ = Resistivity,

l = length,

A = Area

 Ohm (Ω) Resistance R R = V / I ohm (Ω) Power P P = VI Watts (W) Conductivity σ sigma = 1 / ρ Siemens per meter (S/m)

Answer 2

$\huge { \bf {\red {\fbox{\underline{Hey Mate }}}}}$

$\textbf { All formulas of class 10th electricity }$

☆ q = +ne

where ,

q = total no. of charges

n = no. of electrons

e = charge of electron

☆ V =WQ

where ,

V = potential difference

W = Workdone

Q = charge

☆ Potential difference = Va - Vb

= W/Q

= W/IT

☆ I = QT

where ,

I = electric charge

Q = charge

T = time

☆ V = IR

where ,

R = resistence

☆ P = RA / I

where ,

P = resistivity

A = Area of cross section

☆ V = V1 + V2 + V3

V1 = IR1

V2 = IR2

V3 = IR3

=> V = IR1 + IR2 + IR3

=> V = I ( R1 + R2 + R3 )

If , V = IRs

=> IRs = I ( R1 + R2 + R3 )

=> Rs = R1 + R2 + R3

☆ I =I1 + I2 + I3

Accor to OHMS LAW ,

I1 = V/ R1

I2 = V / R2

I3 = V / R3

=> I = V/R1 + V/R2 + V/R3

If , I = V/Rp

=> V/Rp = V/R1 + V/R2 + V/R3 + ........V/Rn

=> V/Rp = V ( 1/R1 + 1/R2 + 1/R3 + ....1/Rn )

=> 1/Rp = 1/R1 + 1/R2 + 1/R3 + ........1/Rn

☆ H = VIT

= I^2RT

= V^2T/R

Where ,

H = heat

☆ E = VIT

where ,

E = Electric energy

☆ P = W / T

where ,

P = power

now putting ,

W = VIT

=> P = VIT / T

=> P = VI