Physics > 2017 > 42
WASSCE
A battery of emf 3.0V is connected across a potentiometer wire AB of 10Ωm-1 as illustrated in the diagram above. If the jocket J makes contact at the 30cm mark, determine the resistance of length AJ and voltage across AJ.
A.
3.0Ω ; 0.9V
B.
3.0Ω ; 3.0V
C.
3.3Ω ; 0.3V
D.
3.3Ω ; 9.0V
Answer: A
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