51. Which quantity does not change in an ordinary transformer?
Answer: C. Frequency
Physics Class 10 Unit 19: Electromagnetism MCQs
60 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 2 of 2.
Tap an option to check your answer.
52. Power is transmitted over long distances at high voltage to
Answer: A. minimise heat loss in the cables
53. Heat dissipation in a transmission cable of resistance R is
Answer: D. I²R
54. A step-up transformer is used before electricity is transmitted by overhead cables because it
Answer: C. increases the voltage to reduce energy loss in the cables
55. When an electron beam passes through an electric field, the electrons are deflected towards the
Answer: B. positive plate
56. The deflection of electrons in a magnetic field depends on their velocity, the strength of the field and the
Answer: A. angle at which they enter the field
57. The cathode ray oscilloscope (CRO) converts
Answer: D. electric signals into visual signals
58. The CRO screen is coated with a thin layer of
Answer: B. phosphor
59. The horizontal and vertical plates of a CRO are used to
Answer: C. deflect the electron beam
60. On a CRO waveform, the horizontal axis shows
Answer: A. time
About Physics Class 10 Unit 19 MCQs (Federal Board)
These 60 Physics MCQs cover Class 10 Unit 19: Electromagnetism of the Federal Board (FBISE) SSC-II (Class 10) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 2 pages of 50. You can also read the Electromagnetism notes for this chapter. Download the Electromagnetism MCQs as a PDF using the button at the top of this page.