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Questions Bank (1389851 total)

Question 1 d)

Two insulating handles are now used to pull the (10.0 cm diameter) electrodes away from each other until they are 1.0 cm apart. The electrodes remain connected to the 15 V battery during this process.

What is the charge on each electrode?

Give

your answer to 0 decimal places in nC. Write your answer without units

i.e., 12.6 nC as 12.6.

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Question 1 c)

Two

10.0 cm diameter electrodes 0.50 cm apart from a parallel plate

capacitor. The electrodes are attached by metal wires to the terminals

of a 15 V battery.

While the capacitor is attached to the battery,

what is the potential

difference between the electrodes

?

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Question 1 b)

Two

10.0 cm diameter electrodes 0.50 cm apart from a parallel plate

capacitor. The electrodes are attached by metal wires to the terminals

of a 15 V battery.

While the capacitor is attached to the battery,

what is the

electric field strength inside the capacitor?

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Question 1 a)

Two

10.0 cm diameter electrodes 0.50 cm apart from a parallel plate

capacitor. The electrodes are attached by metal wires to the terminals

of a 15 V battery.

While the capacitor is attached to the battery, what is the charge on each electrode?

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Question 2e)

A

storm cloud has -25 nC built up in a 1.0 km diameter spherical charge

centre located 10 km above the ground. This charge centre attracts a

similar amount of positive charge that is spread on the ground below the

ground.

The

charge centre and ground act as a charged capacitor, with a potential

difference of

V. In a lightning strike, the large

electric field between these two charged regions (acting as electrodes)

may ionise the air resulting in a conducting path between the cloud and

ground, through which the 'capacitor' discharges.

Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.
e

If the cloud transfers all of its charge to the ground via several rapid lightning flashes lasting a total of 1 s, what is the average power?

Give your answer to 0 decimal places in Gigawatt. Write

your answer without units i.e., 12 GW as 12.

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Question 2d)

A

storm cloud has -25 nC built up in a 1.0 km diameter spherical charge

centre located 10 km above the ground. This charge centre attracts a

similar amount of positive charge that is spread on the ground below the

ground.

The

charge centre and ground act as a charged capacitor, with a potential

difference of

V. In a lightning strike, the large

electric field between these two charged regions (acting as electrodes)

may ionise the air resulting in a conducting path between the cloud and

ground, through which the 'capacitor' discharges.

Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.

If 12.5 C of charge is transferred from the cloud to the ground in a lightning strike, what fraction of the stored energy is dissipated?

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Question 2 b)

A

storm cloud has -25 nC built up in a 1.0 km diameter spherical charge

centre located 10 km above the ground. This charge centre attracts a

similar amount of positive charge that is spread on the ground below the

ground.

The

charge centre and ground act as a charged capacitor, with a potential

difference of

V. In a lightning strike, the large

electric field between these two charged regions (acting as electrodes)

may ionise the air resulting in a conducting path between the cloud and

ground, through which the 'capacitor' discharges.

Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.

Which of the curves shown below best approximates the shape of an equipotential drawn halfway between the charge centre and the ground?

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A

storm cloud has -25 nC built up in a 1.0 km diameter spherical charge

centre located 10 km above the ground. This charge centre attracts a

similar amount of positive charge that is spread on the ground below the

ground.

The

charge centre and ground act as a charged capacitor, with a potential

difference of

V. In a lightning strike, the large

electric field between these two charged regions (acting as electrodes)

may ionise the air resulting in a conducting path between the cloud and

ground, through which the 'capacitor' discharges.

Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.

Calculate the approximate capacitance of the charge centre + ground system.

Give your answer to 0 decimal places in nF. Write

your answer without units i.e., 12 nF as 12.

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Question 2 a)

A storm cloud has -25 nC built up in a 1.0 km diameter spherical charge centre located 10 km above the ground. This charge centre attracts a similar amount of positive charge that is spread on the ground below the ground.

The charge centre and ground act as a charged capacitor, with a potential difference of V. In a lightning strike, the large electric field between these two charged regions (acting as electrodes) may ionise the air resulting in a conducting path between the cloud and ground, through which the 'capacitor' discharges.

Image failed to load: A storm cloud with a spherical (negative) charge centre of 1km diameter sits 10 km above the ground which has positive signs.

What is the approximate magnitude of the electric field between the charge centre and the ground?

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Utilizando la regla de integración Trapezoidal, calcular una aproximación con 5 intervalos (n=5) de la integral:

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