Class 12 Physics: The Graph Bank

Soumya Sir's Physics Class THE GRAPH BANK Visual Physics for Class 12

1. E Field vs Distance (r)

Context: Charged Conducting Shell

Y-Axis: $E$ | X-Axis: $r$

Discontinuous Curve

⚠️ Shape: Zero inside ($r < R$). Jumps to Max at surface. Decays as $1/r^2$ outside.

2. Resistivity ($\rho$) vs Temp (T)

Context: Materials Comparison

Y-Axis: $\rho$ | X-Axis: $T$

A. Copper: Curves Upwards (Exponential-ish)
B. Nichrome: Linear (Straight Line)
C. Silicon: Curves Downwards (Inverse)

3. Susceptibility ($\chi$) vs Temp (T)

Context: Paramagnetic Material

Y-Axis: $\chi$ | X-Axis: $T$

Rectangular Hyperbola

Note: Follows Curie's Law ($\chi \propto 1/T$). Graph curves down touching neither axis.

4. Reactance (X) vs Frequency ($\nu$)

Context: Inductor vs Capacitor

Y-Axis: $X$ | X-Axis: $\nu$

Inductive ($X_L$): Straight Line through origin.
Capacitive ($X_C$): Hyperbola (Curves down).

5. Current ($I_{rms}$) vs Frequency ($\omega$)

Context: LCR Series Resonance

Y-Axis: $I$ | X-Axis: $\omega$

Bell Shaped Curve

Peak: Occurs exactly at $\omega_r = 1/\sqrt{LC}$. Sharpness depends on R (Lower R = Sharper Peak).

6. Deviation ($\delta$) vs Angle of Incidence ($i$)

Context: Glass Prism

Y-Axis: $\delta$ | X-Axis: $i$

"U" Shaped Parabola

Minimum: Bottom point is $\delta_m$. At this point, $i = e$.

7. Stopping Potential ($V_0$) vs Frequency ($\nu$)

Context: Einstein's Equation

Y-Axis: $V_0$ | X-Axis: $\nu$

Straight Line (Not from origin)

Intercept: Cuts X-axis at $\nu_0$ (Threshold Freq).
Slope: Always equal to $h/e$ (Universal Constant).

8. Binding Energy/nucleon vs Mass No. (A)

Context: Stability Belt

Y-Axis: $BE/A$ | X-Axis: $A$

Flat Hill Shape

Peak: At Iron ($Fe^{56}$), value is 8.75 MeV.
Ends: Drops for Light nuclei (Fusion) and Heavy nuclei (Fission).

Draw Graphs with Sharp Pencils only!

Prepared by Soumya Sir