MCQ
The wavefronts of light coming from a distant source of unknown shape are nearly:
- ✓Plane.
- BElliptical.
- CCylindrical.
- DSpherical.
Wave travelling from a distant source always has plane wavefront.
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$(1)$ The measured value of $R$ will be $978 \Omega$
$(2)$ The resistance of the Voltmeter will be $100 k \Omega$.
$(3)$ The resistance of the Ammeter will be $0.02 \Omega$ (round off to $2^{\text {nd }}$ decimal place)
$(4)$ If the ideal cell is replaced by a cell having internal resistance of $5 \Omega$ then the measured value of $R$ will be more than $1000 \Omega$.
