A voltmeter is connected in parallel with a variable resistance, R, which is in series with an ammeter and a cell. For one value of R the meters read…

JAMB Physics 2024 204 views
Source: JAMB · 2024

A voltmeter is connected in parallel with a variable resistance, R, which is in series with an ammeter and a cell. For one value of R the meters read 0.3 A and 0.9 V. For another value of R the readings are 0.25 A and 1.0 V. Find the value of the emf of the cell.

  1. 2.5 V
  2. 2 V
  3. 1.5 V ✓
  4. 0.75 V

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