A galvanometer is a device to measure small currents. To measure the current in

Question

A galvanometer is a device to measure small currents. To measure the current in a branch of an electrical circuit without burning out the galvanometer it must be placed in the branch of interest In parallel with a very low resistance In parallel with a very high resistance In series with a very low resistance To measure the voltage across a portion of a circuit, the experimenter must add a large series resistance to the galvanometer add a small series resistance to the galvanometer add a shunt resistance across the galvanometer. Defibrillators may now be found in many public buildings. These devices are useful should a member if the public experience a stroke a heart attack a conniption.

Explanation / Answer

18. (a)

19. (a)

20. (b)

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