Magnetic and Static Electricity Apparatus

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. A learner stores two bar magnets in a box. Which arrangement best prevents the magnets from losing their magnetism?

   • A. Place them side by side with opposite poles adjacent and soft-iron keepers across the ends
   • B. Place them side by side with like poles adjacent and no keepers
   • C. Place them end to end with copper strips across the ends
   • D. Leave them loose in the box with the north poles pointing the same way

2. 2. A polythene rod is rubbed with a dry woollen cloth. What happens, and what charge does the rod gain?

   • A. Electrons move from the wool to the rod, so the rod becomes negative
   • B. Electrons move from the rod to the wool, so the rod becomes negative
   • C. Protons move from the wool to the rod, so the rod becomes positive
   • D. Protons move from the rod to the wool, so the rod becomes negative

3. 3. A negatively charged rod is brought near the cap of a gold-leaf electroscope that is already negatively charged. What is the sure sign that the rod carries the same type of charge?

   • A. The leaf diverges more
   • B. The leaf collapses
   • C. The leaf stays the same
   • D. The leaf turns to the other side of the stem

4. 4. Name the instrument with a brass cap, an insulating plug and a gold leaf that is used to detect electric charge.

   Type your answer in the lesson.

5. 5. Which part of a lightning arrestor on a school building carries the lightning current safely into the ground?

   • A. A buried copper earthing plate
   • B. A wooden spacer on the roof
   • C. A soft-iron keeper
   • D. A pointed polythene rod

More in Laboratory Apparatus & Instruments

• ▸Measuring Time and Rate in Experiments
• ▸Optical Instruments The Light Microscope
• ▸Operating the Light Microscope
• ▸Electrical Instruments
• ▸Apparatus Maintenance, Storage, Improvisation, and Review

See every Grade 7 Integrated Science lesson →