Please work out question 46 and show work for explanation of how you came up with your answer. 46. An ammeter needle is deflected 52.00° by a current of 0.2500 A.The needle is 3.750 in. long, and a circular scale is used. Howlong is the scale for a maximum current of 1.500 A?47. A drill bit in. in diameter rotates at 1200 r/min. What is the lin-ear velocity of a point on its circumference?48. A helicopter blade is 2.75 m long and is rotating at 420 r/min.What is the linear velocity of the tip of the blade?

Given, Needle deflection is 520 at 0.25 A So, needle deflection at 1.5 A = 1.50.25×520 = 3120…

Answered: 46. An ammeter needle is deflected…

46. An ammeter needle is deflected 52.00° by a current of 0.2500 A. The needle is 3.750 in. long, and a circular scale is used. How long is the scale for a maximum current of 1.500 A?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 13PE: A large cyclotron directs a beam of He ++ nuclei onto a target with a beam current of 0.250 mA. (a)...

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Please work out question 46 and show work for explanation of how you came up with your answer.

46. An ammeter needle is deflected 52.00° by a current of 0.2500 A.
The needle is 3.750 in. long, and a circular scale is used. How
long is the scale for a maximum current of 1.500 A?
47. A drill bit in. in diameter rotates at 1200 r/min. What is the lin-
ear velocity of a point on its circumference?
48. A helicopter blade is 2.75 m long and is rotating at 420 r/min.
What is the linear velocity of the tip of the blade?

Expert Solution

Step 1

Given,

Needle deflection is 52⁰ at 0.25 A

So, needle deflection at 1.5 A = $\frac{1.5}{0.25} \times 52^{0} = 312^{0}$

Needle deflection at 1.5 A = 312⁰

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