The resistance of an ammeter is 13Ω and its scale is graduated for a current

The resistance of an ammeter is 13Ω and its scale is graduated for a current upto 100 amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 amperes by this meter. The value of shunt-resistance is

Options

(a) 2Ω
(b) 0.2Ω
(c) 2 kΩ
(d) 20Ω

Correct Answer:

Explanation:

We know, I / Is = 1 + G / S
750 / 100 = 1 + 13/S
S = 2Ω

admin:

Related Questions

  1. The acceleration of an electron in an electric field of magnitude 50 V/cm,
  2. In the Davisson and Germer experiment, the velocity of electrons emitted from the
  3. The number of NAND gates required to form an AND gate is
  4. Volume of gas becomes four times if temperature becomes
  5. The coherence of two light sources means that the light waves emitted have