3 years ago

This is a device used to change the flow of electricity through a circuit

Physics

2 answers:

Vinvika [58]3 years ago

8 0

Transformers or also called voltage transformers

Natalija [7]3 years ago

8 0

Answer:

Transformers are devices used in electrical circuits to change the voltage of electricity flowing in the circuit. Transformers can be used either to increase the voltage or decrease the voltage.

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A ring of diameter 7.70 cm is fixed in place and carries a charge of 5.00 mC uniformly spread over its circumference. (a) How mu

MatroZZZ [7]

Answer:

3.974 Joule

Explanation:

Diameter of ring = 7.7 cm

a = Distance from the center = d/2 = 3.85 cm = 0.0385 m

Q = Charge = 5 mC

q = Charge to move = 3.4 mC

k = Coulomb constant = 9×10⁹ Nm²/C²

Work done will be equal to Potential energy when mass is at center

$U=\frac{kQq}{a}\\\Rightarrow U=\frac{9\times 10^9\times 5\times 10^{-6}\times 3.4\times 10^{-6}}{0.0385}=3.974\ J$

∴ Work to move a tiny 3.4 mC charge from very far away to the center of the ring is 3.974 Joule

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