MCQ
A field line shown in the figure. This field line cannot represent


- Amagnetic field
- ✓electrostatic field
- Cinduced electric field
- DAll of above

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|
List-$I$ $EM-Wave$ |
List-$II$ $Wavelength$ $Range$ |
| $(A)$ infra-red | $(i)$ $<10^{-3} \mathrm{~nm}$ |
| $(B)$ Ultraviolet | $(II)$ $400 \mathrm{~nm}$ to $1 \mathrm{~nm}$ |
| $(C)$X-rays | $(iii)$ $1 \mathrm{~mm}$ to $700 \mathrm{~nm}$ |
| $(D)$ Gamma rays | $(iv)$ $1 \mathrm{~nm}$ to $10^{-3} \mathrm{~nm}$ |
Choose the correct answer from the options given below:
| Capacitor | Capacitance |
| $(A)$ Cylindrical capacitor | $(i)$ ${4\pi { \in _0}R}$ |
| $(B)$ Spherical capacitor | $(ii)$ $\frac{{KA{ \in _0}}}{d}$ |
| $(C)$ Parallel plate capacitor having dielectric between its plates | $(iii)$ $\frac{{2\pi{ \in _0}\ell }}{{ln\left( {{r_2}/{r_1}} \right)}}$ |
| $(D)$ Isolated spherical conductor | $(iv)$ $\frac{{4\pi { \in _0}{r_1}{r_2}}}{{{r_2} - {r_1}}}$ |
