QUIZ 2 DET10013 SESI 2

1.      Calculate the total capacitance of 10F, 20F, 22F, and 100F capacitor connected in parallel? [C3: Application]

• a.      152F 

• b.      100F

• c.       2.43F

• d.      4.86F

2.      Choose three(3) factors determine the value of the capacitance? [C2:Understand]

i.                    The permittivity of the materials (e )

ii.                   The spacing between the plates

iii.                 The surface area of the plates

iv.                 The length of the material

 

• a.      i, iii and iv

• b.      i, ii and iii

• c.       i, ii and iv

• d.      i, iii and iv

2.      There  are THREE (3) capacitors C₁ , C₂, and C₃ connected in a circuit. Derive the total capacitance (C_T if this circuit connected in series connection [C3: Application]

• a.      CT=(C3XC2)+C1

• b.      CT=(C1XC2)+C3

• c.       1/CT=1/C1+1/C2+1/C3

• d.      CT=C1+C2+C3

2.      By referring to figure 1. When switch are connected, calculate: time taken for capacitor fully charges. [C3: Application]

• a.      4ms

• b.      20s

• c.       0.4s

• d.      40ms

2.      By referring to figure 1. When switch are connected, calculate: Initial current charge [C3: Application]

• a.      75uA

• b.      0.75mA

• c.       0.75

• d.      75A

A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. Calculate the total inductor [C3: Application]

• a. 9.9 mH

• b. 9.9 mH or greater than 5 mH

• c. greater than 5 mH

• d. less than 0.6 mH

2.      Calculate the L_T in  Figure below. [C3: Application]

• a.      0.833mH

• b.      8.33uH

• c.       8.33mH

• d.      8.33H

8.    Calculate the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m², and relative permeability is 750[C3: Application]

 

• a.      530 At/Wb

• b.      531.51 At/Wb

• c.       530.52  At/Wb

• d.      531 At/Wb

9.      Calculate the flux density if the cross-sectional area of a magnetic field increases, but the flux remains the same. [C3: Application]

• a.      Increases

• b.      Decreases

• c.       Doubles

• d.      remains the same

10.      Choose several characteristic of magnetic field EXCEPT [C2:Understand]

• a.      Flux must form a closed loop

• b.      Flux must has tension across line

• c.       Flux move from South to North

• d.      Flux must form a parallel line