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Darina [25.2K]
3 years ago
8

WILL GIVE BRAINLIEST!! 6, 7 & 8 PLEASE!!!

Physics
1 answer:
Troyanec [42]3 years ago
5 0
6 is between 3 and 4 or 3.5 7 is 7.5 and 8 is buggy 1 will win and buggy 1 will have to wait 31.5
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A wire of length 6cm makes an angle of 20° with a 3 mT
Crazy boy [7]

Answer:

Approximately 7.3 \times 10^{-3}\; \rm A (approximately 7.3\; \rm mA) assuming that the magnetic field and the wire are both horizontal.

Explanation:

Let \theta denote the angle between the wire and the magnetic field.

Let B denote the magnitude of the magnetic field.

Let l denote the length of the wire.

Let I denote the current in this wire.

The magnetic force on the wire would be:

F = B \cdot l \cdot I \cdot \sin(\theta).

Because of the \sin(\theta) term, the magnetic force on the wire is maximized when the wire is perpendicular to the magnetic field (such that the angle between them is 90^\circ.)

In this question:

  • \theta = 20^\circ (or, equivalently, (\pi / 9) radians, if the calculator is in radian mode.)
  • B = 3\; \rm mT = 3 \times 10^{-3}\; \rm T.
  • l = 6\; \rm cm = 6 \times 10^{-2}\;\rm m.
  • F = 1.5\times 10^{-4}\; \rm N.

Rearrange the equation F = l \cdot I \cdot \sin(\theta) to find an expression for I, the current in this wire.

\begin{aligned} I &= \frac{F}{l \cdot \sin(\theta)} \\ &= \frac{3\times 10^{-3}\; \rm T}{6 \times 10^{-2}\; \rm m \times \sin \left(20^{\circ}\right)} \\ &\approx 7.3 \times 10^{-3}\; \rm A = 7.3 \; \rm mA\end{aligned}.

5 0
3 years ago
A 5.0-Ω resistor and a 9.0-Ω resistor are connected in parallel. A 4.0-Ω resistor is then connected in series with this parallel
Oliga [24]

Answer:

Explanation:

The current through the  resistor is 0.83 A

.

Part b

The current through  resistor is 0.53 A

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Part c

The current through  resistor is 0.30 A

4 0
3 years ago
Which symbol and unit of measurement are used for voltage?
Keith_Richards [23]

Answer:

I should be V or E I am not sure what you mean by unit.

3 0
3 years ago
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Gloria is Latin for what?
max2010maxim [7]

Answer:

Gloria is the anglicized form of the Latin feminine given name gloriae (Latin pronunciation: ['gloːria]), meaning immortal glory; glory, fame, renown, praise, honor.

Explanation:

mark me as brainlist

5 0
3 years ago
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A gun of mass 500g fires a bullet of mass 10 g with a speed of 100m/s. Find;
____ [38]

Answer:check the pic

Explanation:

8 0
3 years ago
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