Electromagnetic Induction & Alternating Currents-AC Generator and Transformer [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 10 - 13 of 18
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Question 10
Question MCQ▾
A transformer has turn ratio 100: 1. If secondary coil has 4 amp current then current in primary coil is
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.4 A | |
b. | 400 A | |
c. | 4 A | |
d. | 0.04 A |
Question 11
Question MCQ▾
A 50 Hz a. c. current of crest value 1A flows through the primary of a transformer. If the mutual inductance between the primary and secondary be 1.5 H, the crest voltage induced in secondary is-
Choices
Choice (4) | Response | |
---|---|---|
a. | 471 V | |
b. | 75 V | |
c. | 300 V | |
d. | 150 V |
Question 12
Question MCQ▾
Voltage (r. m. s) in the secondary coil of a transformer depends upon
(1) Voltage in the primary coil
(2) Ratio of number of turns in the two coils
(3) Frequency of the source
(4) Time-period of the source
Select the correct answers and mark it according to the following
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 and 2 are correct | |
b. | 2 and 4 are correct | |
c. | 1 and 3 are correct | |
d. | 1,2 and 3 are correct |
Question 13
Question MCQ▾
A current of 5A is flowing at 220 V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2200V and 50% of power is lost, then the current in the secondary coil will be -
Choices
Choice (4) | Response | |
---|---|---|
a. | 5A | |
b. | 0.025A | |
c. | 2.5A | |
d. | 0.25A |