In an RC differentiator, responding to repetitive pulses, the average value of the output.

To understand how the output voltage is shaped by a differentiator, you must consider

A

The response to the rising pulse edge

B

The response between the rising and falling edges

C

The response to the falling pulse edge

D

All of the above

Lubana purchased 20 kg of pulses at a rate of Tk. 14.25 per kg and 30 kg of pulses at a rate of TK. 11.50 per kg.She decided to mix the two and sold the mixture. To make a profit of 30% what price per kg should he sell the mixture ?

A

15.60

B

14.80

C

16.38

D

18.20

Three maths classes: X, Y, and Z take an algebra test. The average score of class X is 83. The average score of class Y is 76. The average score of class Z is 85. The average score of class X and Y is 79 and the average score of class Y and Z is 81. What is the average score of the combined classes X, Y, and Z?

A

81

B

81.5

C

82

D

84.5

Three math classes , X, Y , and Z, take an algebra test. The average score in class X is 83. The average score in class Y is 76. The average score in class Z is 85. The average score of all students in classes X and Y together is 79. The average score of all student classes Y and Z together is 81. What is the average for all the three classes?

A

81

B

81.5

C

82

D

84.5

A differentiator is usually not a part of a control system because it

A

Reduces damping

B

Reduces the gain margin

C

Increases input noise

D

Increases error

In an OP-amp differentiator

A

The amplitude of output is proportional to rate of change of input

B

The amplitude of output is proportional to input

C

Output occurs when input is finite and constant

D

Polarity of input and output is the same

An RC differentiator acts as a

A

Low-pass filter

B

High-pass filter

C

Band-pass filter

D

Band-stop filter

In an RC differentiator, the capacitor.

A

Charges exponentially at a rate depending on the RC time constant

B

Charges exponentially at a rate depending on the input voltage

C

Charges when the input voltage is decreasing

D

Charges to approximately one time constant

In an RL differentiator, when the input pulse goes from its low level to its high level,

A

The inductor prevents a sudden change in voltage

B

The inductor prevents a sudden change in current

C

Voltage across the inductor instantly reaches 63% of input voltage

D

Voltage across the inductor is zero

In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant.

A

Must be zero

B

Must be equal to the applied voltage

C

Is less than the applied voltage but greater than zero

D

Cannot be determined

In an RC differentiator, responding to repetitive pulses, the average value of the output.

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