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Slav-nsk [51]
3 years ago
13

The magnetic field in the region between the poles of an electromagnet is uniform at any time, (1 point) but is increasing at th

e rate of 0.090 T/s. The area of the conducting loop in the field is 110 cm2. What is the magnitude of the induced emf?
A. 0.12 mV
B. 0.99 mV
C. 0.31 mV
D. 0.82 mV
Physics
1 answer:
olga nikolaevna [1]3 years ago
5 0

Answer:

B)

The magnitude of induced emf in the conducting loop is 0.99 mV.

Explanation:

Rate of increase in magnetic field per unit time = 0.090 T/s

Area of the conducting loop = 110 cm^2 = 0.0110 m^2

Electromagnetic induction is the production of an emf or voltage in a coil of wire due to a changing magnetic field through the coil.

Induced e.m.f is given as:

EMF = (-N*change in magnetic field/time)*Area

EMF = rate of change of magnetic field per unit time * Area

EMF = 0.090 * 0.0110

EMF = 0.00099 V

EMF = 0.99 mV

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A prismatic bar AB of length L and solid circular cross section (diameter d) is loaded by a distributed torque of constant inten
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b) the angle of twist between the ends of the bar is 16tL² / πGd⁴  

Explanation:

Given the data in the question, as illustrated in the image below;

d is the diameter of the prismatic bar of length AB

t is the intensity of distributed torque

(a) Determine the maximum shear stress tmax in the bar

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shear stress τ = 16T/πd³

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τ_{max} = 16T_{max} /πd³

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Therefore,  the angle of twist between the ends of the bar is 16tL² / πGd⁴  

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