Electrodynamics and Electric circuits (part)

1

The diagrams show a current-carrying wire with an arrow in the direction of the current. Which diagram shows the magnetic field produced by the current?

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A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.

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1

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
What can she do to get a bigger reading?

Hold the bar magnet stationary inside the coil.

Move the bar magnet slowly away from the coil.

Use a coil of wire with fewer turns on it.

Use a stronger bar magnet.

1

This magnet is removed from the coil.
Which option is correct?

P = induced north pole, induced current is from X to Y

P = induced north pole, induced current is from Y to X

P = induced south pole, induced current is from X to Y

P = induced south pole, induced current is from Y to X

In the experiment below, the effect on a current-carrying conductor in an external magnetic field is studied.

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The conductor experiences a force upwards and moves in the direction of the arrow.

1

What is the direction of the current?

into the page

out of the page

1

What is the polarity of the magnet?

A is North, B is South

B is North, A is South

1

A

B

C

D

Consider the following circuit. The battery has negligible internal resistance.

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1

When the switch is closed, what happens to the total resistance in the circuit?

increases

decreases

remains the same

1

When the switch is closed, the reading on the voltmeter will ....

increase

decrease

remain the same

Consider the following circuit. The battery has negligible internal resistance. You can assume the resistors are identical.

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1

When the switch is closed, what happens to the total resistance in the circuit?

increases

decreases

remains the same

1

When the switch is closed, what happens to the reading on the ammeter?

increases

decreases

remains the same

Electrodynamics and Electric circuits (part)

The diagrams show a current-carrying wire with an arrow in the direction of the current. Which diagram shows the magnetic field produced by the current?

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.What can she do to get a bigger reading?

This magnet is removed from the coil.Which option is correct?

What is the direction of the current?

What is the polarity of the magnet?

When the switch is closed, what happens to the total resistance in the circuit?

When the switch is closed, the reading on the voltmeter will ....

When the switch is closed, what happens to the total resistance in the circuit?

When the switch is closed, what happens to the reading on the ammeter?

The diagrams show a current-carrying wire with an arrow in the direction of the current. Which diagram shows the magnetic field produced by the current?

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.What can she do to get a bigger reading?

This magnet is removed from the coil.Which option is correct?

What is the direction of the current?

What is the polarity of the magnet?

When the switch is closed, what happens to the total resistance in the circuit?

When the switch is closed, the reading on the voltmeter will ....

When the switch is closed, what happens to the total resistance in the circuit?

When the switch is closed, what happens to the reading on the ammeter?

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
What can she do to get a bigger reading?

This magnet is removed from the coil.
Which option is correct?

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
What can she do to get a bigger reading?

This magnet is removed from the coil.
Which option is correct?