Answer / praveen

for example take a transistor it needs more 0.7v(for
germanium) to switch ON so this voltage is called break down
voltage.

Answer / madhu

it is not the voltage needed by the device, but it is the
voltage after which the device cant work.

we can say that as the voltage after which the device
efficiency decreases rapidly.

Answer / jessy

A level of voltage at which breakdown/malfunctioning takes
place in a device or anything to which it is applied.

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