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hodyreva [135]
3 years ago
7

Joan makes the device shown in her science class. What would happen to the magnetic field if she connects the battery in the opp

osite direction?
A) The field would stop.
B) The field would get stronger.
C) The field would reverse its poles.
D) The field would get weaker.

Physics
2 answers:
Vaselesa [24]3 years ago
7 0

Answer: C) The field would reverse its poles.

Explanation:

The given diagram shows an electromagnet. A iron nail is placed between coil through which current is passes as it is connected to the battery.

When the terminals are reversed, the current still flows but in the opposite direction. Magnetic field is still generated but with the reversed poles.  

Magnetic field produced:

B = μ n I

The direction of the magnetic field reverses with the direction of the current.

NISA [10]3 years ago
3 0

the answer is C) The field would reverse its poles.


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3 0
1 year ago
An unbanked circular highway curve on level ground makes aturn
tino4ka555 [31]

Answer:

Explanation:

Given

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to make a safe turn centripetal force with radius of curvature r is given by

F_c=\frac{mv^2}{r}

(F_c)_{max}=\frac{mg}{10}=F_c=\frac{mv^2}{r}

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4 0
4 years ago
Suppose a conducting rod is 52 cm long and slides on a pair of rails at 2.75 m/s. What is the strength of the magnetic field in
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Answer:

5.6 Tesla

Explanation:

L = 52 cm = 0.52 m

V = 2.75 m/s

e = 8 V

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e = B × V × L

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3 years ago
Betelgeuse is 100,000 times more luminous than our sun, which means that it releases an estimated 3.846 x 1031 W of luminous lig
denis-greek [22]

Answer:

5.4  × 10⁸ W/m²

Explanation:

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The Power (P) of Betelgeuse is estimated to release 3.846 × 10³¹ W

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radius of the earth = 1.27 × 10⁷ m

half the distance (i.e radius r ) = 7.5  × 10¹⁰ m

a) What is the intensity of Betelgeuse at the "earth’s" surface?

The Intensity of  Betelgeuse  can be determined by using the formula:

Intensity \ I = \frac{P}{4 \pi r^2}

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I = 544097698.8 W/m²

I = 5.4  × 10⁸ W/m²

8 0
3 years ago
Read 2 more answers
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