Electrical Materials Set 1

Silver nitrate ✘ Ferric oxide ✘ Small particles of iron ✘ Silicon iron ✔

Electric field ✘ Magnetic field ✘ Electromagnetic field ✘ None of the above ✔

Smoky and dirty atmosphere ✘ Humidity in the atmosphere ✘ Both (A) and (B) ✘ Neither (A) nor (B) ✔

Electrical contacts ✘ Thermocouple ✘ Heating element in high temperature furnace ✘ All of the above ✔

Produce harmonic distortion ✘ Follows Ohm's law at low temperatures only ✘ Result in nonuniform heating ✘ None of the above ✔

Precision instruments ✘ Heating elements ✘ Motor starters ✘ All of the above ✔

GLS lamps ✘ Electric arc furnace ✘ Dry cells ✘ Cinema projectors ✔

1 ✘ 2 ✘ 4 ✘ 8 ✔

Nonlinear conductor ✘ Reverse conductor ✘ Bad-conductor ✘ Non-conductor ✔

Decreases ✘ Increases ✘ Remains constant ✘ None of the above ✔