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Q. 4

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
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Short Answer

A low-pass filter has a crossover frequency Hz.What is if:

a. The resistance is doubled?

b. The capacitance is doubled?

c. The peak emf is doubled?

Part(a) will be Hz

Part(b) will be Hz

Part(c) will be Hz

See the step by step solution

Step by Step Solution

Part(a) Step 1 : Given information

We have been given that

A low-pass filter has a crossover frequency Hz

We have to find if resistance is doubled.

Part(a) Step 2 : Simplify

As we know in Low Pass filter ,

where,

Resistance

Capacitance

Now, according to question:

Hz

if resistance is doubled

becomes

Hz

so becomes Hz if resistance is doubled.

Part(b) Step 1 : Given information

We have been given that

A low-pass filter has a crossover frequency Hz.

We have to find if capacitance is doubled.

Part(b) Step 2 : Simplify

As we know in Low Pass filter ,

where,

resistance

capacitance

Now, according to question:

Hz

If resistance is doubled

becomes

Hz

so becomes Hz if capacitance is doubled.

Part(c) Step 1 : Given information

We have been given that

A low-pass filter has a crossover frequency Hz

We have to find if peak emf is doubled.

Part(c) Step 2 : Simplify

As we know in Low Pass filter ,

where,

Resistance

Capacitance

Now, according to question

If peak emf is doubled there will be no change.

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