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For the transformer ,the ratio of the number of turns in secondary winding to the number of turns in the primary winding is 25.The secondary winding has 8250 turns.Find the number of turns in the primary.Type your ans to 3 SF.

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Related questions

Part a: Multiple choice (22 x 2 = 44 Marks)
Circle the letter of the response that represents the correct answer.
1. When you roll a 6-sided cube, numbered 1 to 6, the probability of rolling a 2 is 16 . This is an example of:
a) an experimental probability
b) theoreticalprobability
c) subjective reasoning
d) assumption
2. An image rotated around its centre point appears unchanged after 180° and 360° turns. This is an example of:
a) line symmetry
b) rotationsymmetry
c) tessellation
d) vertex
3. You survey people as they leave a Blue Bomber game and ask them to identify their favourite sport. The potential problems or bias in data is caused by:
a) cultural insensitivity
b) costconcerns
c) ethical behaviour
d) timeandtiming
4. Given the following pattern of shapes, choose the mathematical expression showing the changes for each iteration if b is the number of boxes in the previous iteration.
a) b+1 b) b+2 c) b–1 d) b–2

Part a: Multiple choice (22 x 2 = 44 Marks)
Circle the letter of the response that represents the correct answer.
1. When you roll a 6-sided cube, numbered 1 to 6, the probability of rolling a 2 is 16 . This is an example of:
a) an experimental probability
b) theoreticalprobability
c) subjective reasoning
d) assumption
2. An image rotated around its centre point appears unchanged after 180° and 360° turns. This is an example of:
a) line symmetry
b) rotationsymmetry
c) tessellation
d) vertex
3. You survey people as they leave a Blue Bomber game and ask them to identify their favourite sport. The potential problems or bias in data is caused by:
a) cultural insensitivity
b) costconcerns
c) ethical behaviour
d) timeandtiming
4. Given the following pattern of shapes, choose the mathematical expression showing the changes for each iteration if b is the number of boxes in the previous iteration.
a) b+1 b) b+2 c) b–1 d) b–2

of the pupils in Primary 5 scored an 'A' for a test. The ratio of the number of pupils who scored a ' B 'to the number who scored on 'A' was 5:3. The rest of the pupils scored a 'C' and a  'D' in the ratio 6: 5. The pupils who scored a B were 48 more than the pupils who scored a 'C'.
(a) How many pupils were there in Primary 5 ?
(b) How many pupils foiled the test if the failure was a 'D' grade?

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