Switch Gear
For the protection of power station buildings against direct strokes the requirements are

None of these
interception and conduction
interception, conduction and dissipation
interception
interception, conduction, dissipation and reflection

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Arc in a circuit breaker behaves as

a capacitive reactance
a resistance decreasing with voltage rise across the arc
an inductive reactance
a resistance increasing with voltage rise across the arc

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A switchgear is device used for

switching and controlling an electrical circuit
switching, controlling and protecting the electrical circuit and equipment
switching an electrical circuit 111
interrupting an electrical circuit

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