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AP EAMCET202022 Sep 2020Morning ShiftPhysicsCurrent ElectricityActual

In given figure, an ammeter reads 5 ~A and voltmeter reads 40 ~V . The actual value of resistance R is

Options

  1. A8
  2. Bgreater than 8
  3. Cless than 8
  4. D200

Correct answer

B. greater than 8

Step-by-step solution

Current in ammeter, I=5 ~A We know that, voltmeter has a very high resistance. Hence, current flowing through voltmeter is very low. array ll & 5=I₁+I₂ I₁=5-I₂ As, & I₂>0 & I₁ 8 array

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