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Leni [432]
3 years ago
11

(a) from the definition of capacitance c = q/δv, it follows that an uncharged capacitor has a capacitance of zero.

Physics
1 answer:
galina1969 [7]3 years ago
6 0
That statement is true.
the capacitor is initially uncharged, but starts to charged when the switch is closed.
The potential difference across the resistor will steadily dropped as the potential difference across the capacitor increased.
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Bill is learning to play tennis. He does pretty well hitting the ball back to his opponent but, many times he misses the ball wh
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A football player runs from his own goal line to the opposing team's goal line returning to the fifty yard line all i 18.0s calc
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3 0
4 years ago
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A microwave oven operates at 2.00 ghz . what is the wavelength of the radiation produced by this appliance? express the waveleng
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7 0
4 years ago
A single-turn circular loop of wire of radius 5.0 cm lies in a plane perpendicular to a spatially uniform magnetic field. During
Artemon [7]

Answer:

Induced EMF,\epsilon=0.0143\ volts

Explanation:

Given that,

Radius of the circular loop, r = 5 cm = 0.05 m

Time, t = 0.0548 s

Initial magnetic field, B_i=200\ mT=0.2\ T

Final magnetic field, B_f=300\ mT=0.3\ T

The expression for the induced emf is given by :

\epsilon=\dfrac{d\phi}{dt}

\phi = magnetic flux

\epsilon=\dfrac{d(BA)}{dt}

\epsilon=A\dfrac{d(B)}{dt}

\epsilon=A\dfrac{B_f-B_i}{t}

\epsilon=\pi (0.05)^2\times \dfrac{0.3-0.2}{0.0548}

\epsilon=0.0143\ volts

So, the induced emf in the loop is 0.0143 volts. Hence, this is the required solution.

5 0
3 years ago
A fisherman sees his boat moving up and down, owing to waves on the water. It takes 2.5 s for the boat to travel from its highes
nata0808 [166]

Answer:

The waves are traveling in a speed of

v=1.20 m/s

Explanation:

The fisherman see a wave at 6m apart so that's the wavelength

L=6m

Now the period is the time between two successive waves so

t=2*2.5s=5s

The velocity of the waves is describe by:

v=f*L

f=\frac{1}{t}=\frac{1}{5s}=20s^{-1}

v=0.20s^{-1}*6m

v=1.20 \frac{m}{s}

7 0
4 years ago
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