MCQ's on Basic 5 Electrical

MCQ's on Basic 5 Electrical

Question 41

If one plate of a parallel plate capacitor is charged with positive charge the other plate is charged to??

  (a) Negative

  (b) Positive

  (c) Not charged

  (d) Either Positive or Negative

The correct answer is (a) Negative


Question 42

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

  (a) Decreases

  (b) Becomes Zero

  (c) Increases

  (d) Remains same

The correct answer is (c) Increases


Question 43

When capacitors are connected in series, which of the following rules are applied?

  (a) Current divider

  (b) Voltage divider

  (c) Neither Voltage nor Current divider

  (d) Both Voltage and Current divider

The correct answer is (b) Voltage divider


Question 44

For which medium capacitance is high??

  (a) Air

  (b) Mica 

  (c) Metal

  (d) Water

The correct answer is (c) Metal


Question 45

What is the number of primary turns in a 200/1000 V transformer if the emf per turn is 10V?

  (a) 5

  (b) 10

  (c) 20

  (d) 40

The correct answer is (c) 20

The number of primary turns is the ratio of induced emf in the primary to the emf induced per turn. Thus, the number of primary turns in a 200/1000 V transformer with emf per turn of 10V is 200/10 = 20.


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