Revision: Electromagnetism Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 19 Electromagnetism - Revision Quiz Test your understanding of Electromagnetism here: 1 / 5 1) 2011 S4 EOY P1 Q26 A stream of negatively charged particles is projected horizontally between two magnetic poles as shown in the diagram. Under the influence of the magnetic field, the particles will be deflected towards the south pole S. perpendicularly into the paper. towards the north pole N. perpendicularly out of the paper. 2 / 5 2) 2014 S4 EOY P1 Q28 The diagram shows a simple d.c. motor. Which of the following correctly identifies the connection of carbon brushes to the positive terminal of the battery and, the correct value of the torque at the instant shown in the above diagram? carbon brush connected to positive terminal: K value of torque at instant shown: Minimum carbon brush connected to positive terminal: K value of torque at instant shown: Maximum carbon brush connected to positive terminal: J value of torque at instant shown: Minimum carbon brush connected to positive terminal: J value of torque at instant shown: Maximum 3 / 5 3) A beam of electrons enters a region in which there are magnetic and electric fields. The uniform magnetic field is directed downwards. How should a uniform electric field be applied such that the beam of electrons passes straight through the region without deviation? out of the plane of the screen into the plane of the screen downwards along the plane of the screen upwards along the plane of the screen 4 / 5 4) 2010 S4 EOY P1 Q27 In the following diagram, a compass is placed above a current-carrying wire and it is close to a magnet. The Earth's magnetic field may be ignored. If the current flows towards the right, which of the following diagrams shows the direction of the compass needle? ""*;N;}} 5 / 5 5) A horseshoe magnet rests on a mass balance with a horizontal metal rod XY situated between the poles of the magnet. The rod is connected to a circuit as shown. With no current in the rod, the reading on the balance is 142.0 g. With a current of 2.0 A in the rod in the direction Y to X, the reading on the balance changes to 144.6 g. The battery polarity is reversed and the variable resistor is adjusted so that there is a current of 3.0 A in the rod in the direction X to Y. What is the new reading on the balance? 148.5 g 140.7 g 145.9 138.1 g Your score is Restart quiz
