A device for storing capacitance.

What is the shape of the electric field between two flat charged plates.

A uniform field between the plates with a curved field at the ends.

A uniform field between the plates.

A spherical field increasing towards infinity.

A spherical field decreasing towards infinity.

Which type of graph would correctly explain the relationship between the electric field force, F, between two charges and their separation r.

F is inversely proportional to r.

F is inversely proportional to r 2 .

Two horizontal parallel plate conductors are separated by a distance of 5.0 mm in air. The lower plate is earthed and the potential of the upper plate is + 50 V. Which of the following is correct at a point midway between the plates??

E = 1x10 -4 Vm -1 downwards ; V = 25V

E = 1x10 -4 Vm -1 upwards ; V = 25V

E = 1x10 -4 Vm -1 upwards ; V = 50V

E = 1x10 -4 Vm -1 downwards ; V = 50V

Which of the following could be used to increase the capacitance of a capacitor?

Increase the permitivitty of the dielectric

Increase the separation between each metal plate.

A capacitor of capacitance 15 x 10 -6 F is fully charged and the potential difference across its plates is 8.0V. It is then connected into the circuit as shown. The switch S is closed at time t = 0. Which one of the following statements is correct?

After a time equal to the time constant, the potential difference across the capacitor is 2.96 V.

The time constant of the circuit is 6.0 ms.

The initial charge on the capacitor is 12 mC.

After a time equal to twice the time constant, the charge remaining on the capacitor is Q o e 2 , where Q o is the charge at time t = 0.

The graph shows how the charge stored by a capacitor varies with the potential difference across it as it is charged from a 6 V battery. Which one of the following statements is not correct?

When the potential difference is 6 V the energy stored is 180 µJ

The capacitance of the capacitor is 5.0 µF.

When the potential difference is 2 V the charge stored is 10 µC.

When the potential difference is 2 V the energy stored is 10 µJ.

Is there a limit to the amount of charge that capacitor can hold and why/why not>?

Yes, because the dielectric will breakdown in such a large field and charge will flow.

Yes, as the ratio of charge to p.d. is fixed.

Yes, because the dielectric will breakdown in such a large field and charge will remain.

No, as capacitance can always increase as p.d. increases.

A clumsy student drops a bar magnet and it breaks into this configuration. Afterwards, what is the result for the left and right magnets respectively?

N-S on the left and N-S on the right

N-N on the left and S-S on the right

S-N on the left and S-N on the right

S-S on the left and N-N on the right

A clumsy student drops a bar magnet and it breaks into this configuration. Afterwards, what is the magnetic force between the two pieces?

attracting because opposite poles attract

neutral because both magnets are neutral

repelling because like poles repel

attracting because like poles attract

Two magnets are broken in half as shown. Which statement is true?

The bottom pair of magnets attract each other while the top pair repels.

Both pairs of magnets attract each other.

The top pair of magnets attract each other while the bottom pair repels.

Both pairs of magnets repel each other.

Point P has a magnetic field B. If P were moved twice as a far away while the current is halved, the resulting magnetic field would be

1/4 the strength in the same direction

1/2 the strength in the same direction

twice the strength in the same direction

four times the strength in the same direction

A long straight current-carrying wire carries current to the right. Which statement is true about the field at point B?

It has the same magnitude as point A and is directed into the page (-z)

It has the same magnitude as point A and directed out of the page (z)

It has a lesser magnitude than A and is directed into the page (-z)

It has a lesser magnitude than A and is directed out of the page (z)

A long straight current-carrying wire carries current to the right. Which statement is true about the field at point C?

It has a lesser magnitude than A and is directed out of the page (z)

It has the same magnitude as point A and is directed into the page (-z)

It has the same magnitude as point A and directed out of the page (z)

It has a lesser magnitude than A and is directed into the page (-z)

A wire has conventional current directed into the page. Which is true about the direction and magnitude of the magnetic field of the points?

All points have a magnetic field that points down (-y) but all have different magnitudes.

All points have magnetic fields that point down (-y) and have the same magnitude as each other.

Some points have magnetic fields that point down (-y) and all have different magnitudes.

Some points have magnetic fields that point down (-y) and all have the same magnitude as each other.

Two equal currents travel into and out of the page respectively. Along which line would the magnetic fields from each current cancel out?

the magnetic field does not cancel along any of these lines

Which two are true about the electromagnet?

The paperclips are attached to the north pole.

The magnetic field points down (-y) inside the nail.

The magnetic field points up (+y) inside the nail.

The paperclips are attached to the south pole.

Which of the following is true about the magnetic field formed inside the solenoid?

The left side of the solenoid is the north pole.

The right side of the solenoid is the north pole.

When a charge moves between two points in an electric field, or a mass moves between two points in a gravitational field, energy may be transferred. Which one of the following statements is correct?

The energy transferred is independent of the path followed.

No energy is transferred when the movement is parallel to the direction of the field.

The energy transferred is independent of the start and finish points.

Energy is transferred when the movement is perpendicular to the field lines.

Which one of the following statements about gravitational potential is incorrect ?

It is analogous to the electric potential at a point in an electric field.

It is equal to the gravitational potential energy of a mass of 1 kg.

The difference in gravitational potential between two points at different heights above the Earth depends on the position of the points.

Which of the following statements about Newton’s law of gravitation is correct? Newton’s gravitational law explains

how various factors affect the gravitational force between two particles.

the origin of gravitational forces.

why a falling satellite burns up when it enters the Earth’s atmosphere

why projectiles maintain a uniform horizontal speed.

IB HL Physics

Authored by Charles Martinez

Physics

10th - 12th Grade

NGSS covered

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56 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

0 V

180 V

360 V

4500 V

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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NGSS.HS-PS3-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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NGSS.HS-PS2-4

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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NGSS.HS-PS2-4

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fields can be

only electrical

only magnetic

both electrical or magnetic

neither electrical nor magnetic

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What types of fields can make objects move without touching?

Only electric fields

Only magnetic fields

Both electric and magnetic fields

Neither electric nor magnetic fields

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5

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IB HL Physics

Fields can be

What types of fields can make objects move without touching?

What is a capacitor?

What is the SI, base unit for capacitance

What is the shape of the electric field between two flat charged plates.

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