The diagram shows a horizontal rectangular wire coil WXYZ between the poles of a magnet. N S coil W X Y Z There is a current in the coil in the direction shown...

5054_s21_qp_11

MCQ

2021

Paper 1, Variant 1

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The diagram shows a current-carrying conductor between the poles of a magnet. The force on the wire acts downwards. direction of current magnetic poles Four changes are possible. The current is increased. A stronger magnet is used. The current is reversed. The poles exchange positions. Which two changes made together keep the force acting downwards?

5054_s21_qp_11

MCQ

2021

Paper 1, Variant 1

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A left hand can be used to determine the direction of the force when a current-carrying conductor is perpendicular to a magnetic field. P Q R Which quantities are represented by the direction of fingers P, Q and R?

5054_s22_qp_12

MCQ

2022

Paper 1, Variant 2

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Object X is stationary and positively charged. It experiences a force due to the field produced by object Y. The arrows show the direction of the field produced by Y. Y X Which statement about the direction of the force on X is correct?

5054_s23_qp_11

MCQ

2023

Paper 1, Variant 1

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The diagram shows a wire carrying a current in a magnetic field. current magnetic field What is the direction of the force on the wire?

5054_s24_qp_12

MCQ

2024

Paper 1, Variant 2

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A coil, carrying a current, is arranged within a magnetic field. The coil experiences forces that can make it move. magnetic field current current Y X In which direction does the coil move?

5054_w05_qp_1

MCQ

2005

Paper 1, Variant 0

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A copper wire is held between the poles of a magnet. magnet wire S N The current in the wire can be reversed. The poles of the magnet can also be changed over. In how many of the four directions shown...

5054_w06_qp_1

MCQ

2006

Paper 1, Variant 0

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Each of the diagrams is a cross-section through two parallel, current-carrying conductors. Which diagram shows correctly the magnetic field pattern and the directions of the forces on the two conductors?

5054_w08_qp_1

MCQ

2008

Paper 1, Variant 0

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shows a wire passing through a hole in a horizontal, plastic board. horizontal board wire compass 6.0 V – + The wire carries a current vertically upwards. A student moves a small compass around the board and plots the magnetic field lines due to the current. Draw a diagram of the board as seen from above and mark on it the magnetic field lines due to the current. The current is increased. Describe how the magnetic field changes. A 6.0 V power supply produces a current of 8.0 A in the wire. Calculate the total resistance of the circuit, the charge that flows through the wire in 2.0 minutes. The north pole of a bar magnet is held on the left of the wire and the south pole of another bar magnet is held on the right, as shown in . N S State the direction of the magnetic field at the wire due to these two poles. The wire is flexible. Describe the effect of this magnetic field on the current-carrying wire. The current in the wire is now reversed. State the effect of this on the wire. Describe how this effect is put to use in a d.c. motor.

5054_w08_qp_2

THEORY

2008

Paper 2, Variant 0

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Each diagram shows a cross-section through two parallel conductors, each carrying an electric current. In the conductor on the left, the current is into the page; on the right, it is out of the page. Which diagram shows the directions of the forces on the two conductors?

5054_w09_qp_1

MCQ

2009

Paper 1, Variant 0

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