Electrical Engineering - Transformers
Exercise "Everyone is wise until he speaks."
- (Proverb)
11.
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
12.
In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is
A. one-fourth the primary current B. four times the primary current C. equal to the primary current D. one-fourth the primary current and equal to the primary current
Answer: C
Explanation:
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13.
A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
Answer: C
Explanation:
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14.
The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330
Answer: A
Explanation:
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15.
The primary winding of a power transformer should always be
Answer: B
Explanation:
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load. The turns ratio is 3:1. What is the secondary voltage?