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PHYSICS

JAMB 2006 - Question 26

Physics 2006 JAMB Past Questions - Question 26: An ammeter of resistance 5 Q has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is

Choose the correct answers from the options given.

An ammeter of resistance 5 Q has a full-scale deflection when a current of 50 mA flows in it. The value of the resistor required to adapt it to measure a current of 5 A is

A: 19.80 Q.

B: 5.00 Q

C: 0.05 Q.

D: 0.25 Q.

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Correct Answer

Explanation

R = (igrg)/I-ig = (50 x 10-3 x 5)/5-(50 x 10-3) = (0.25)/4.95 = 0.0505 = 0.05?