Q39. A row of 25 decorative lights, connected in series, is connected to a main transformer. When the supply is switched on, the lights do not work. The owner uses a voltmeter to test the circuit. When the voltmeter is connected across the third bulb in the row, a reading of zero is obtained. Which of the following cannot be the only fault in the circuit? Physics — Current Electricity — Question 39 of 484A. The filament of one of the other bulbs has brokenB. The filament of the third bulb has broken.C. The fuse in the mains transformer has blown.D. There is a break in the wire from the supply to the transformer.Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →