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) 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 downwards along the plane of the screen into the plane of the screen upwards along the plane of the screen 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: Maximum carbon brush connected to positive terminal: K value of torque at instant shown: Minimum 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) 2018 S4 EOY P1 Q28 Two current-carrying wires are parallel to each other. Which of the following correctly shows the direction of the forces acting on the two wires? 4 / 5 4) 2017 S4 EOY P1 Q24 The diagram below shows two soft-iron rods suspended vertically side by side inside a coil of wire. Which of the following correctly describes what happen to the soft-iron rods when an electric current passes through the coil as shown? They move towards each other. They remain stationary. They move upwards. The move away from each other. 5 / 5 5) A student sets up the circuit as shown below to magnetise a steel bar. Which of the following statements about the circuit set up is not correct? The longer the circuit is on, the stronger the magnetisation of the steel bar. A north-pole will be set up at Q when the circuit is on. The same circuit can demagnetise a magnet if an a.c. source is used. The steel bar and the solenoid should be placed along a North-South direction. Your score is Restart quiz
