What is the inductive reactance? 5.2 ? 7.5 ? 1.3 k? 7.5 k?

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7.5 kΩ

Inductors problems

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2. Electromagnetism is the:
Options
A. magnetic field caused by a permanent magnet
B. action between a permanent and an artificial magnet
C. magnetic field action with a current-carrying wire
D. current in the coil

4. A magnetic circuit breaker will open to protect equipment only when:
Options
A. voltage is exceeded
B. an open is in the equipment
C. the equipment is operating properly
D. current is exceeded

5. You could decrease the time constant of an RL circuit by
Options
A. adding a resistor in parallel with the circuit resistance
B. adding an inductor in series with the circuit inductance
C. decreasing the amplitude of the input voltage
D. exchanging the position of the resistor and inductor in the circuit

7. When a transformer secondary lead has been connected to a middle loop that is not an end connector, it is called a:
Options
A. multiple-tapped secondary
B. center-tapped secondary
C. multiple winding secondary
D. single winding secondary

8. Which coil would be used as a step-up transformer primary if coil number 1 has 100 more turns than coil number 2?
Options
A. The coil windings must be the same.
B. coil 1
C. The coil ratio is too small.
D. coil 2

9. Inductance is:
Options
A. directly proportional to the length of the coil
B. directly proportional to the number of turns on the coil
C. inversely proportional to the cross-sectional area of the coil
D. inversely proportional to the permeability

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