# Modeling

This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Modeling”.

1. What has been modelled in the following Simulink screenshot?

a) The step response of the unit step signal with a step time=0
b) The step response of the ramp signal with a step time=4
c) The ramp response of the step signal with a ramp slope=1
d) The step response of the unit step signal with a step time=2

2. The system, that has been modelled in the following Simulink screenshot has ___ initial conditions.

a) 0
b) Some
c) Impossible
d) Cannot be determined

3. Digital systems ______ in Simulink.
a) Can be implemented
b) Cannot be implemented
d) Only DAC’s

4. The no. of logical operations present in the logical operator block is _________
a) 6
b) 7
c) 5
d) 3

5. The arrows connecting each block with another are ____
a) Flexible as in they don’t become permanent when once placed
b) Rigid as in their direction cannot be changed
c) Don’t pop up in the screen
d) Absent

6. The output at scope 1 is?

a) 0
b) Impulse function
c) Ramp function
d) Step function

7. What have we modelled here?

a) A capacitor which is blocking DC
b) An inductor which is blocking AC
c) A resistor whose resistance changes with temperature
d) A capacitor which is being charged

8. What can be the possible limitation of this block?

a) No. of zeros never equal to no. of poles not allowed
b) No. of zeros lesser than no. of poles not allowed
c) No. of zeros greater than no. of poles not allowed
d) No. of zeros equal to no. of poles not allowed

9. The limits of the graph obtained from the scope can be changed from the ________
a) Configuration properties
b) Style option
c) Layout option
d) Stepping option

10. For this block, the early voltage is always infinite.

a) Yes
b) No
c) Not always
d) Cannot be determined

11. We _______ simulate circuits in MATLAB.
a) can
b) cannot
c) can, only by blocks
d) can or cannot

12. Photodiodes are present in the _________ section of the Simscape toolbox
a) Special Purpose Diodes
b) Semiconductor devices
c) Diodes
d) Sensors

13. Where is the following block present?

a) Nowhere
b) Sink
c) Source
d) Ground

14. The output in the scope is an analog signal.
a) True
b) False
.

15. The Battery is also viewed as a charge dependent source.

a) True
b) False

16. We can model __ impulse function in discrete domain
a) No
b) Unit
c) Shifted unit
d) Any

17. What does the following model portray?

a) Measuring impulse response of a system
b) Measuring impulse response of a system
c) Measuring ramp response of a system
d) Measuring step response of a system

18. What does the following model show?

a) The discrete impulse is shifted by 8 units in time
b) The discrete transfer function is shifted by 8 units in time
c) The output has an error
d) The output does not match the graph

19. What does this block do?

a) Gives a logic 1 if the input is greater than it’s previous value
b) Gives a logic 0 if the input is greater than it’s previous value
c) Gives a logic 1 if the input is smaller than it’s previous value
d) Gives a logic 0 if the output is greater than it’s previous value

20. What does this model do?

a) Generate a step and ramp function
b) Generate a ramp and parabolic function
c) Generate pulse function
d) Error