Test 3 Short Answer
Cards (12)
- 2 parallel conductors each of 0.5m length, separated by 5e-3m and carrying 3.0 A in opposite directions will experience what force?
- What law states that each segment of a current produces a magnetic field like that of a long straight wire, and the total field of any shape's current is the vector sum of the field due to each segment?
- What definition of Ampere's Law states that for parallel wires separated by 1m with each carrying 1 A, the force per m is 2e-7 N/m?
- What is the name of the device that compares currents in live/hot neutral wires and will trip if their difference exceeds a safe value?
- What is the term for motion in a magnetic field that is stationary relative to the earth?
- In the normal use of a transformer, the input voltage is put on the ______ and the ______ coil produces the transformed output voltage?
- Can a transformer be used to transform pure DC voltages?
- What effect is responsible (in large circuit breakers) for concentrating an arc between plates of a switch break a large current, burn holes, or ignite equipment?
- A voltmeter must be connected in _____?
- An ammeter must be connected in _____?
- What null measurement device is used for calculating resistances?
- What null measurement device is used for measuring voltages?