MCQ
Wave front formed by the collimator of a spectrometer:
- APlane
- ✓Spherical
- CCylindrical
- DParaboloidal
Wave front formed by the collimator of a spectrometer is a plane wave front, when r lit is in the focus.
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Statement$-I:$In an ac circuit, the current through a capacitor leads the voltage across it.
Statement$-II:$ In a.c. circuits containing pure capacitance only, the phase difference between the current and the voltage is $\pi$
In the light of the above statements, choose the most appropriate answer from the options given below
[Use $\varepsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 / \mathrm{Nm}^2$ ]