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

Chapter22: Magnetism

Section: Chapter Questions

Problem 51PE: The force per meter between the two wires of a jumper cable being used to start a stalled car is...

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Concept explainers

Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.

Question

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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