source : yahoo.com
What is the average emf induced in the coil as it rotates?
The magnetic flux starts out as AB
= pi(0.13 m)^2*(0.15 T),
and ends up as 0 after 0.30s.
emf = -N delta(phi)/delta(t)
= (100)(pi)(0.13 m)^2 (0.15 T)/(0.30s)
= 2.65 Tm^2/s
= 2.65 (kg/amp-s^2)*m^2/s
= 2.65 J/(amp-s)
= 2.65 J/C
= 2.65 volts.
Phew, I’m glad it comes out to volts…
Solved: (Figure 1) Shows A 100-turn Coil Of Wire Of Radius – (Figure 1) shows a 100-turn coil of wire of radius 18 cm in a 0.35 T magnetic field. The coil is rotated 90∘ in 0.30 s, ending up parallel to the field. What is the average emf induced in the coil as it rotates? Express your answer to two significant figures and include the appropriate units.Calculating the Emf Induced in a Generator Coil The generator coil shown in Figure 1 is rotated through one-fourth of a revolution (from θ = 0º to θ = 90º) in 15.0 ms. The 200-turn circular coil has a 5.00 cm radius and is in a uniform 1.25 T magnetic field. What is the average emf induced?What is the average emf induced in the coil? A closely wound rectangular coil of 95.0 turns has dimensions of 30.0cm by 46.0cm. The plane of the coil is rotated from a position where it makes an…
Electric Generators | Physics – Lumen Learning – The maximum value of the induced emf is, E 0 = NABω. Hence, the induced emf can be represented as e = E 0 sin ωt The induced emf e varies sinusoidally with time t and the frequency being ν cycles per second (v = ω/2π) (i) When ωt = 0, the plane of the coil is perpendicular to the field B and hence e = 0.Then an EMF (voltage) will be induced in the wire. This voltage will cause a current to flow (the induced current in the loop). Faraday quantified the size of the induced voltage: f i f i t t N t N − Φ −Φ =− ∆ ∆Φ ε=− Faraday's Law Induced EMF The size of the induced EMF depends on how quickly the flux through the coil is changing.9- Following figure shows a 100-turn coil of wire of radius 12 cm in a 0.15 T magnetic field. The coil is rotated 90° in 0.30 s, ending up parallel to the field. What is the average emf induced in the coil as it rotates? [2.3 V]
What is the average emf induced in the coil? | Yahoo Answers – Over a full cycle, the average emf induced in the coil is zero. Maximum current is given as: The current induced in the coil produces a torque opposing the rotation of the coil. The rotor is an external agent.The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil. It involves the interaction of charge with magnetic field. Also to know is, why is EMF zero when magnetic flux is maximum? An emf is induced in the coil because of this changing magnetic flux.What Is The Average Emf Induced In The Coil As It Rotates? This problem has been solved! See the answer (Figure 1) shows a 100-turn coil of wire of radius 11cm in a 0.35T magnetic field. The coil is rotated 90? in 0.30 s, ending up parallel to the field.