Electricity measuring equipments Questions and Answers

A plug-in transformer supplies 9.00 V to a video game system. (a) How many turns are in its secondary coil if its input voltage is 120 V and the primary coil has 383 turns? (b) What is its input current when its output is 1.13 A?

A clamp on ammeter is clamped on all three wires of a 120 volt circuit that is drawing 9.68 amps. What will the ammeter read as the total amperage? Select one: a. 0 A b. 4.84 A c. 19.36 A d. 21 A

In working of moving coil galvanometer (select the correct alternatives) Eddy current help in achieving equilibrium of coil faster. Cylindrical soft iron core helps in make magnetic field radial & increasing strength of torque on coil. Parallex error needs to minized while taking measurement. Marking on scale are equally spaced for equal change in current.