Electrical Circuits and Electric Currents Multiple Choice Questions 53 PDF Download

Learn electrical circuits and electric currents MCQs, grade 7 online science test 53, uses of electromagnets multiple choice questions and answers. Uses of electromagnets revision test has science worksheets, helping answer key with choices as heat and sound waves, light waves and heat, sound waves and heat energy of multiple choice questions (MCQ) with uses of electromagnets quiz as the loudspeaker changes electric signals into for competitive exam prep, viva interview questions. Free science study guide to practice uses of electromagnets quiz to attempt multiple choice questions based test.

MCQs on Electrical Circuits and Electric Currents Quiz PDF Download Worksheets 53

MCQ. The loudspeaker changes the electric signals into

  1. light waves and heat
  2. heat and sound waves
  3. sound waves
  4. heat energy

C

MCQ. Earth wire is a wire that

  1. is used to earth excess current
  2. insulates excess current
  3. diffuses excess current
  4. recharges voltage

A

MCQ. The wire coil is wound round the neck of a

  1. paper cone
  2. magnet
  3. bass tube
  4. mechanical magnet

A

MCQ. One of the causes of overloading is

  1. long circuit
  2. short circuit
  3. overloaded cables
  4. heavy circuit

B

MCQ. Sometimes, bulb does not light up even if the circuit is complete because the

  1. energy is low
  2. power is low
  3. resistance is high
  4. electric charges are insufficient

A