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3 years ago

Lesson : Electricity and Magnetism

Physics

2 answers:

juin [17]3 years ago

7 0

Answer:

Explanation:

A is North Pole, D equator. H is the magnetic North Pole n C the magnetic equator.

I is 10-12 degrees

magnet points to N-S direction as in a compass

Oxana [17]3 years ago

4 0

Answer:

Explanation:

The funny-looking circle is a hint but iii confirms we are talking about Eartth's magnetic field here :)

i. A is North Pole while H is the magnetic North Pole. D is the equator while C is the magnetic equator.

ii. I, the tilt angle, is about 11 degrees.

iii. A freely suspended magnet inclines towards HF or AG because it always points towards North/South.

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Nata [24]

When the child is moving fastest

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3 years ago

Read 2 more answers

Compare the magnitude of the magnetic field at the center of a circular current loop of radius 30 mm with the magnitude of the m

NISA [10]

Answer:

Ratio of magnetic field will be $\frac{B}{B'}=0.0055$

Explanation:

We have given radius of the loop r = 30 mm = 0.03 m

We know that magnetic field at the center of the loop is given by

$B=\frac{\mu _0i}{2r}$ ---------eqn 1

Number of turns in the solenoid is given as n = 3 turn per mm = 3000 turn per meter

We know that magnetic field due to solenoid is given by

$B'=n\mu _0i$ -------------eqn 2

Now dividing eqn 1 by eqn 2

$\frac{B}{B'}=\frac{\frac{\mu _0i}{2r}}{\mu _0ni}=\frac{1}{2nr}=\frac{1}{2\times 3000\times 0.03}=0.0055$

4 0

3 years ago

A 10 m long steel beam is accidentally dropped by a construction crane from a height of 4.89 m. The horizontal component of the

Otrada [13]

Answer:

e = 1.21 mV

Explanation:

given,

length of rod = 10 m

height of drop = 4.89 m

Earth’s magnetic field = 12.4 µT

acceleration of gravity = 9.8 m/s²

velocity of the beam

$v = \sqrt{2gh}$

$v = \sqrt{2\times 9.8 \times 4.89}$

v = 9.79 m/s

emf of the beam

e = B l v

e = 12.4 x 10⁻⁶ x 9.79 x 10

e = 1.21 x 10⁻³ V

e = 1.21 mV

4 0

3 years ago

Question 2 of 10<br> Which two types of energy does a book have as it falls to the floor?

IrinaVladis [17]

Gravitational energy and motion energy

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2 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

zhannawk [14.2K]

<h3>Answer;</h3>

A- Potential energy

B- Kinetic energy

C- Potential energy

D - Both potential energy and kinetic energy

E- Both potential and kinetic energy

Potential energy is the energy possessed by the body while at rest. It is calculated by the formula mgh, where m is the mass of the body and h is the height, and g is the gravitational acceleration.

Kinetic energy on the other hand is the energy possessed by the body while in motion. It is calculated by the formula 1/2mv², where m is the mass and v is the velocity of the object or body in motion.

5 0

3 years ago