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melamori03 [73]
3 years ago
14

Why is an iron core needed in an electromagnet?

Physics
1 answer:
ella [17]3 years ago
4 0
An iron core is needed in an electromagnet because it  serves to increase the magnetic field created. It has a ferromagnetic properties. <span>An </span>electromagnet<span> is essentially just a battery attached to a coil of wire wrapped around a metal</span>core<span>. </span>
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An AC generator consists of 6 turns of wire. Each turn has an area of 0.040 m2. The loop rotates in a uniform field (B = 0.20 T)
Alja [10]

Answer:

The maximum induced emf is 15.08 V

Explanation:

Given;

number of turns of the generator, N = 6 turns

area of the loop, A = 0.04 m

magnetic field of the loop, B = 0.2 T

frequency of loop, f = 50 Hz

The  maximum induced emf is given by;

E = NBAω

Where;

ω is the angular speed = 2πf

E = NBA(2πf)

E = 6 x 0.2 x 0.04 x (2 x 3.142 x 50)

E = 15.08 V

Therefore, the maximum induced emf is 15.08 V

5 0
3 years ago
The volume of the lung 0.0024m^3 following exhalation and the pressure is 101.70KPa. Calculate the volume of the lungs during in
Mekhanik [1.2K]

According to Boyle-Mariotte:

p₁V₁=p₂V₂=>V₂=p₁V₁/p₂= 0.0024*101.70/ 84.16=0.0028 m³

5 0
4 years ago
Johannes Kepler, an apprentice of Brahe, believed in the heliocentric universe but rejected past astronomers' belief in
Rashid [163]
<span>So the question is in what did johannes Kepler reject since he believed in the heliocentric universe. So heliocentric system is a system where the sun is in the center of the Solar system. Geocentric system is the system where Earth, not Sun is in the center of our system. He was against Geocentric system. </span>
5 0
3 years ago
Read 2 more answers
A train rolls to a stop along a horizontal track without the conductor applying the brakes. What answer choice BEST explains why
Naya [18.7K]

Answer:

B

Explanation:

Friction always eventually stops whatever is in motion.

4 0
4 years ago
A wheel has a constant angular acceleration of 1.9 rad/s2. During a certain 7.0 s interval, it turns through an angle of 63 rad.
Anarel [89]

Answer:

4.5s

Explanation:

That must be the right answer.

3 0
3 years ago
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