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For a power transistor, which of the following relations is true?
a Explanation: Practically speaking Ie = Ib+Ic. Ie is the highest as it is the sum of the collector and base currents. The base current is the smallest.
a
Explanation: Practically speaking Ie = Ib+Ic. Ie is the highest as it is the sum of the collector and base currents. The base current is the smallest.
See lessFor a power transistor, if the forward current gain α = 0.97, then β = ?
d Explanation: Use the relation α = β/(β+1).
d
Explanation: Use the relation α = β/(β+1).
See lessA power BJT is used as a power control switch by biasing it in the cut off region (off state) or in the saturation region (on state). In the on state
a Explanation: When base-emitter & base-collector junctions are forward biased only than both the p-n junctions are forward biased and the device is on.
a
Explanation: When base-emitter & base-collector junctions are forward biased only than both the p-n junctions are forward biased and the device is on.
See lessThe value of β is given by the expression
a Explanation: Collector current by the base current is beta, its value is in the range 50 to 300.
a
Explanation: Collector current by the base current is beta, its value is in the range 50 to 300.
See lessThe forward current gain α is given by
b Explanation: Collector current by emitter current is the current gain, its value is close to one but never greater than.
b
Explanation: Collector current by emitter current is the current gain, its value is close to one but never greater than.
See lessFor a power transistor, if the base current IB is increased keeping VCE constant, then
a Explanation: Ic is directly proportional to Ic.
a
Explanation: Ic is directly proportional to Ic.
See lessIn a power transistor, the IB vs VBE curve is
c Explanation: The B-E junction of a BJT resembles a p-n junction diode, hence the curve.
c
Explanation: The B-E junction of a BJT resembles a p-n junction diode, hence the curve.
See lessIn a power transistor, _________ is the controlling parameter.
c Explanation: The base current controls the collector current. Hence, the base current Ib is the controlling parameter.
c
Explanation: The base current controls the collector current. Hence, the base current Ib is the controlling parameter.
See lessA power transistor is a _________ device.
d Explanation: Power transistor is simply many BJT’s connected in series parallel on a single silicon chip for power applications. It is a three terminal, bipolar, current controlled device.
d
Explanation: Power transistor is simply many BJT’s connected in series parallel on a single silicon chip for power applications. It is a three terminal, bipolar, current controlled device.
See lessIn a power transistor, ____ is the controlled parameter.
d Explanation: The collector current is the controlled parameter.
d
Explanation: The collector current is the controlled parameter.
See less