Virtual Labs

Study and operation of Magnetic Levitation

1. Which sensor is used in magnetic levitation experiment?

a: Ultrasonic sensors Explanation

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b: IR sensors Explanation

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c: Hall effect sensors Explanation

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d: None of the above Explanation

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2. What is the disadvantage of proportional controller?

a: Provides a constant steady state error Explanation

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b: Improves stability of the system Explanation

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c: Improves steady state error Explanation

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d: None of the above Explanation

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3. Which of the following controllers improves steady state error and also stability of the system?

a: P controller Explanation

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b: PI controller Explanation

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c: PD controller Explanation

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d: All of the above Explanation

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4. A condition where integral control action drives the output of a controller into saturation, is called

a: Self-bias Explanation

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b: Repeat Explanation

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c: Wind-up Explanation

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d: Noise Explanation

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5. Which of the following system provides excellent transient and steady state response ?

a: Proportional action Explanation

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b: Proportional + Differential action Explanation

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c: Proportional + Integral action Explanation

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d: Proportional + Integral + Differential action Explanation

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6. The magnetic force, responsible for magnetic levitation is__

a: Magnetic attraction force Explanation

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b: Magnetic repulsion force Explanation

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c: None of the above Explanation

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d: Both of the above Explanation

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7. The MAGLEV is a_____ plant

a: SISO Explanation

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b: SIMO Explanation

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c: MIMO Explanation

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d: None of the above Explanation

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8. The ________ part of a PID controller is very sensitive to noise

a: Derivative Explanation

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b: Integral Explanation

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c: Both of the above Explanation

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d: None of the above Explanation

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9. If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity

a: Less than that of disc but in opposite direction Explanation

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b: Equal to that of disc and in the same direction Explanation

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c: Equal to that of disc and in the opposite direction Explanation

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d: Less than that of disc and in the same direction Explanation

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10. In a magnetic levitation system , the propulsion force is to,

a: Push moving part forward Explanation

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b: Lift up the moving part Explanation

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c: Avoid derailing Explanation

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d: None of the above Explanation

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