Question

A circular loop in the plane of the paper lies in a 0.78 T magnetic field...

A circular loop in the plane of the paper lies in a 0.78 T magnetic field pointing into the paper.

A) What is the magnitude of the average induced emf? Answer in V.

B) If the coil resistance is 4.3 ohm , what is the average induced current? Answer in A

Homework Answers

Answer #1

I think you have missed the other information mentioned in the problem. I think the missing information should be the loop diameter changes from d1 to d2 in time t seconds.

You have given the value of B = 0.78 T

So, for the part (A) -

The expression of the induced emf is -

V = dø / dt = 0.78 . ( ? . (d1/2)^2 – ? .(d2/2)^2 ) / t

put the values of d1, d2 and t, you will get the result.

For the part (B) -

Coil resistance R = 4.3 Ohm

So, avearge induced current I = V / R = (put the value of V calculated in part A) / 4.3  

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A circular loop in the plane of the paper lies in a 0.75 T magnetic field...
A circular loop in the plane of the paper lies in a 0.75 T magnetic field pointing into the paper. The loop’s diameter is changed from 20.0 cm to 6.0 cm in 0.50 s. Determine the direction of the induced current and justify your answer. Determine the magnitude of the average induced emf. If the coil resistance is 2.5 Ω, what is the average induced current?
A circular loop in the plane of a paper lies in a 0.75 TT magnetic field...
A circular loop in the plane of a paper lies in a 0.75 TT magnetic field pointing into the paper. The loop's diameter changes from 20.5 cmcm to 6.4 cmcm in 0.46 ss . What is the magnitude of the average induced emf? What is the average induced current if the coil resistance is 4.3 Ω?
A circular loop in the plane of the paper lies in a 0.76 T magnetic field...
A circular loop in the plane of the paper lies in a 0.76 T magnetic field pointing into the paper. If the loop's diameter changes from 20.2 cm to 9.6 cm in 0.56 s. What is the direction of the induced current? What is the magnitude of the average induced emf?
A circular loop in the plane of the paper lies in a 0.38 T magnetic field...
A circular loop in the plane of the paper lies in a 0.38 T magnetic field pointing into the paper. Part A: If the loop's diameter changes from 19.4 cm to 5.8 cm in 0.49 s , what is the direction of the induced current? Part B: What is the magnitude of the average induced emf?
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of...
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.23 V and a current of 2.4 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What (a) emf and (b) current are...
A time-varying magnetic field is perpendicular to the plane of a circular loop of diameter 10...
A time-varying magnetic field is perpendicular to the plane of a circular loop of diameter 10 cm made with wire of diameter 3.4 mm and resistivity 2.07 × 10-8?·m. The magnetic field increases as a function of time, with magnitude B = (0.79 t) T/s a) What is the magnitude of the emf induced in the loop? b) What is the value of the current through the loop? c) At what rate does energy appear as thermal energy in the...
9. A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude...
9. A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.77 V and a current of 2.7 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What emf is induced in the...
6: A single-turn circular loop of wire rests flat on this page. A magnetic field is...
6: A single-turn circular loop of wire rests flat on this page. A magnetic field is directed perpendicular to this page pointing outwards (towards you). When the magnetic field strength increases from 3.2 T to 6.5 T in 0.026 seconds, a 1 V emf is induced in the coil. a) Calculate the radius of the loop. b) State the direction of the induced current and briefly explain how you arrived at your answer.
A two-turn circular wire loop of radius 0.737 m lies in a plane perpendicular to a...
A two-turn circular wire loop of radius 0.737 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.591 T. If the entire wire is reshaped from a twoturn circle to a one-turn circle in 0.116 s (while remaining in the same plane), what is the magnitude of the average induced emf E in the wire during this time? Use Faraday’s law in the form E = − ∆(N Φ) ∆t . Answer in units of V.
A circular conducting loop of radius 31.0 cm is located in a region of homogeneous magnetic...
A circular conducting loop of radius 31.0 cm is located in a region of homogeneous magnetic field of magnitude 0.300 T pointing perpendicular to the plane of the loop. The loop is connected in series with a resistor of 109 Ω. The magnetic field is now increased at a constant rate by a factor of 2.40 in 15.0s. 1) Calculate the magnitude of the induced emf in the loop while the magnetic field is increasing. 2) Calculate the magnitude of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT