Basic Electrical Engineering Mock Test 3

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Question 1 of 10

1. If a 1ohm 2ohm and 32/3ohm resistor is connected in star, find the equivalent delta connection.

34 ohm, 19.67 ohm, 3.19 ohm

34 ohm, 18.67 ohm, 3.19 ohm

33 ohm, 19.67 ohm, 3.19 ohm

33 ohm, 18.67 ohm, 3.19 ohm

Question 1 of 10

Question 2 of 10

2. When capacitors are connected in parallel, what happens to the effective plate area?

Remains the same

Becomes zero

Increases

Decreases

Question 2 of 10

Question 3 of 10

3. Four 10F capacitors are connected in series, calculate the equivalent capacitance.

3.5F

1.5F

0.5F

2.5F

Question 3 of 10

Question 4 of 10

4. What is the total capacitance when three capacitors, C1, C2 and C3 are connected in parallel?

1/C1+1/C2+1/C3

C1+C2+C3

C1/(C2+C3)

C2/(C1+C3)

Question 4 of 10

Question 5 of 10

5. Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between B and C?

Rc+Rb+Rc*Ra/Rb

Rc+Rb+Ra*Rb/Rc

Rc+Rb+Rc*Rb/Ra

Ra+Rb+Ra*Rc/Rb

Question 5 of 10

Question 6 of 10

6. Calculate the voltage across the 2F capacitor.

66.67V

23.43V

56.56V

33.33V

Question 6 of 10

Question 7 of 10

7. For very low frequencies, capacitor acts as ________

Short circuit

Rectifier

Amplifier

Open circuit

Question 7 of 10

Question 8 of 10

8. Two 4F capacitors are connected in series, calculate the voltage across each if the total voltage is 20V.

20V

10V

Question 8 of 10

Question 9 of 10

9. Which among the following equations is incorrect?

C=Q/V

V=Q/C

Q=CV

Q=C/V

Question 9 of 10

Question 10 of 10

10. If ZL=Zs’, then RL=?

-Rs

-RL

Question 10 of 10