Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Step signal is the signal whose values is :a)...
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Step signal is the signal whose values is :
- a)1 for all values greater than zero
- b)Indeterminate at zero
- c)It is zero for time less than zero
- d)All of the mentioned
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Step signal is the signal whose values is :a)1 for all values greater ...
Answer: d
Explanation: Step signal is the signal whose value varies from zero to level in zero time.
Explanation: Step signal is the signal whose value varies from zero to level in zero time.
Most Upvoted Answer
Step signal is the signal whose values is :a)1 for all values greater ...
Step Signal:
A step signal, also known as a unit step function, is a signal that has a constant value of 1 for all values greater than zero. It is commonly denoted as u(t), where t represents time. The step signal is defined as follows:
u(t) = 1, for t ≥ 0
Explanation:
The given options are:
a) 1 for all values greater than zero
b) Indeterminate at zero
c) Zero for time less than zero
d) All of the mentioned
The correct answer is option d) All of the mentioned.
Let's analyze each option:
a) 1 for all values greater than zero:
This is true because the step signal has a constant value of 1 for all time values greater than zero. It remains at 1 indefinitely.
b) Indeterminate at zero:
This option is incorrect. The step signal is well-defined at t = 0. It has a value of 1 at t = 0.
c) Zero for time less than zero:
This option is incorrect. The step signal does not have a value of zero for time values less than zero. It remains at 1 for all positive time values.
d) All of the mentioned:
This option is correct because it includes the correct statements from options a, b, and c. The step signal has a value of 1 for all time values greater than zero, it is well-defined at t = 0 with a value of 1, and it does not have a value of zero for time values less than zero.
Therefore, the correct answer is option d) All of the mentioned.
A step signal, also known as a unit step function, is a signal that has a constant value of 1 for all values greater than zero. It is commonly denoted as u(t), where t represents time. The step signal is defined as follows:
u(t) = 1, for t ≥ 0
Explanation:
The given options are:
a) 1 for all values greater than zero
b) Indeterminate at zero
c) Zero for time less than zero
d) All of the mentioned
The correct answer is option d) All of the mentioned.
Let's analyze each option:
a) 1 for all values greater than zero:
This is true because the step signal has a constant value of 1 for all time values greater than zero. It remains at 1 indefinitely.
b) Indeterminate at zero:
This option is incorrect. The step signal is well-defined at t = 0. It has a value of 1 at t = 0.
c) Zero for time less than zero:
This option is incorrect. The step signal does not have a value of zero for time values less than zero. It remains at 1 for all positive time values.
d) All of the mentioned:
This option is correct because it includes the correct statements from options a, b, and c. The step signal has a value of 1 for all time values greater than zero, it is well-defined at t = 0 with a value of 1, and it does not have a value of zero for time values less than zero.
Therefore, the correct answer is option d) All of the mentioned.
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