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____ [38]
3 years ago
12

. A PNP transistor is connected in a circuit so that the collector-base junction remains reverse biased and the emitter-base jun

ction is forward biased. This transistor can be used as a power amplifier because
Physics
2 answers:
Irina18 [472]3 years ago
8 0
The correct answer for the question that is being presented above is this one: "A. the output current will be much larger than the input current. " This transistor can be used as a power amplifier because the output current will be much larger than the input current. 

Here are the following choices:
A. the output current will be much larger than the input current. 
<span>B. the output current will be much smaller than the input current. </span>
<span>C. the output voltage will be much larger than the input voltage. </span>
<span>D. the output voltage will be much smaller than the input voltage. </span>
Elodia [21]3 years ago
6 0

Explanation :

A power amplifier is used to amplify electric signals i.e. to increase the low power signal to higher powers.

A PNP transistor is connected in a circuit so that the collector-base junction remains reverse biased and the emitter-base junction is forward biased.

This transistor can be used as a power amplifier because it gives a much larger output current. The gain of an amplifier shows the amount of amplification. It is the difference between the input and the output signals.

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Answer:

a) F = 527.65 N, Force applied is upwards.

b)F = - 527.65 N, where, negative sign depicts Force is applied downwards.

Explanation:

Data provided:

Weight of the firefighter = 756 N

Mass of the firefighter = 756/9.8 = 77.14 Kg

Acceleration, a = 2.96 m/s²

a) In the absence of the pole the firefighter would have been moving down with an acceleration of 9.8 m/s (i.e the acceleration due to the gravity), but due to the presence of the pole the acceleration of the firefighter has been reduced. thus, a force is applied by the pole on the firefighter to reduce the acceleration.

therefore, we have

F = ma(net) = 77.14 × (9.8-2.96) = 527.65 N, Force applied is upwards.

B) According to the Newton's third law, the force will be equal and opposite to the force in the part a)

thus, we have

F = - 527.65 N

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