Physics
Negative feedback in amplifiers

Decreases bandwidth and decreases noise
Increases bandwidth and increases noise
Decreases bandwidth and increases noise
Increases bandwidth and decreases noise

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Physics
In total internal reflection, the light travel from

Denser to rarer medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity
Rarer to denser medium and it occurs with loss of intensity
Rarer to denser medium and it occurs with no loss of intensity

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