Why is the core of a transformer laminated?

Transformer core is laminated to reduce Eddy currents. Eddy currents are formed in loop. In a whole piece of iron, a big loop of Eddy current will form, which will have stronger effect. So, we laminated the core such that Eddy currents are formed in each lamina separately, of smaller size (due to increased path size of current and increased resistance). Thus energy less due to Eddy currents is reduced.

E M B I B E

Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-1>Q 22

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IMPORTANT

Earn 100

$11 kW$ of electric power can be transmitted to a distant station at $220 V .$ Which of the two modes of transmission should be preferred and why? Support your answer with a possible calculations.

Important Questions on Alternating Current

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-1>Q 22

11 kW

of electric power can be transmitted to a distant station at

22000 V .

Which of the two modes of transmission should be preferred and why? Support your answer with possible calculation.

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-1>Q 23

Answer the following question:
A choke coil in series with a lamp is connected to a dc line. The lamp is seen to shine brightly. Insertion of an iron core in the choke causes no change in the lamp’s brightness. Predict the corresponding observations if the connection is to an ac line.

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-1>Q 24

Air-cored chokes are used for reducing high-frequency A.C. why?

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 22 - Alternating Current>Assignment Set-1>Q 25

Iron-cored chokes are used for reducing low frequency ac why?

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