{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

QTest #4-solutions - Version 085/ABBBB – QTest#4 –...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Version 085/ABBBB – QTest #4 – Antoniewicz – (56495) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 5.0 points Suppose that a uniform wire of resistance R is stretched uniformly to N times its original length. Assume the total volume of the wire re- mains the same, and the volume is given by the product of the cross sectional area and the length. Denote the original area by A and the area after the stretch by A ′ . The ratio A ′ A is 1. A ′ A = 1 N 2 2. A ′ A = N 3. A ′ A = 1 √ N 4. A ′ A = 1 N 2 / 3 5. A ′ A = N 3 / 2 6. A ′ A = 1 7. A ′ A = 0 8. A ′ A = 1 N correct 9. A ′ A = N 2 10. A ′ A = √ N Explanation: Let : ℓ ′ = N ℓ . The volume before the stretch is V = A ℓ where ℓ is the length. The volume after the stretch is V ′ = A ′ ℓ ′ = A ′ N ℓ....
View Full Document

{[ snackBarMessage ]}

Page1 / 2

QTest #4-solutions - Version 085/ABBBB – QTest#4 –...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online