| Front | What is the formula for induced e.m.f ? |
| Back | \[E = {- Δ(NΦ) \over Δt}\]or\[E = {- ΔBAN \over Δt}\]B = Magnetic Flux DensityA = Area perpendicular to the magnetic fluxN = Number of coils\(E\) = Induced e.m.f.\(NΦ\) = magnetic flux linkage\(t\) = timeNote: it is negative as it is to indicate "The direction of the induced e.m.f is such as to cause effects that oppose the change producing it". And also note that emf is only induced when there is a change in magnetic flux linkage, which in turns means change in |
| Tags | Formula Magnetic_Fields Physics |
| Front | What is the formula of Electrical Resistivity? |
| Back | \[ρ ={RA \over L}\]\(R\) = Resistance (not resistivity ofc,)\(A\) = Cross-sectional area of the conductor\(L\) = Length of the conductorNote : Resistance is defined as the property of the conductor which opposes the flow of electric current. Resistivity is defined as the resistance offered by the material per unit length for unit cross-section. |
| Tags | Electricity Formula Physics |
| Front | Define Forced Oscillations. |
| Back | Forced Oscillations is when a periodic driving force is applied to a system which is capable of vibration |
| Tags | Oscillations Physics |