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physics Practice tests Neco, Jamb, Wascce,SSce, Sat, Gre, Toefel, Gmat Online

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A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is




16cm
B


12cm
C


8cm
D

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Th e thermometr ic substance of an absolute thermometer is




Mercury
B


Helium
C


Platinum
D

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A cell of internal resistance r supplies current to a 6.0 Ohms resistor and its efficiency is 75%. Find the value of r




1.0 Ohms
B


8.0 Ohms
C


2.0 Ohms
D

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