A voltmeter having a resistance of 998    Ω is connected to a cell of emf 2 V and internal resistance 2  Ω. The error in the measurement of emf will be

Error in measurement - Actual value Measured valueActual value = 2V i=2998+2=1500 ASince  E=V+ir ⇒  V=E −ir  =2  −1500 × 2=998500 V∴  Measured value  =998500 V⇒  Error=2−998500 =4 ×  10−3V