Simple Phenomena Of Magnetism
Muhtasari
A magnet can pull a paperclip across a desk without touching it, and a compass needle swings to point north on its own. Behind both is a magnetic field, an invisible region of influence that you can map, explain and put to work in everything from doorbells to electric motors.
In this lesson you will learn the rules of attraction and repulsion between poles, the difference between magnetic and non-magnetic materials and between temporary and permanent magnets, how to draw and plot a magnetic field, and where permanent magnets and electromagnets are used.
Malengo
- Describe the forces between magnetic poles and between magnets and magnetic materials, including the use of the terms north pole (N pole), south pole (S pole), attraction and repulsion, magnetised and unmagnetised
- Describe induced magnetism
- State the differences between the properties of temporary magnets (made of soft iron) and the properties of permanent magnets (made of steel
- State the difference between magnetic and non-magnetic materials
- Describe a magnetic field as a region in which a magnetic pole experiences a force
- Draw the pattern and direction of magnetic field lines around a bar magnet
- State that the direction of a magnetic field at a point is the direction of the force on the N pole of a magnet at that point
- Describe the plotting of magnetic field lines with a compass or iron filings and the use of a compass to determine the direction of the magnetic field
- Describe the uses of permanent magnets and electromagnets
- [Supplement] Explain that magnetic forces are due to interactions between magnetic fields
- [Supplement] Know that the relative strength of a magnetic field is represented by the spacing of the magnetic field lines
Maelezo ya Somo
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Simple Phenomena Of Magnetism. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which test reliably shows that a bar is magnetised? A. it is attracted by a magnet B. it repels one end of a known magnet C. it is made of iron D. it is heavy Answer: B
- Magnetic field lines around a bar magnet point: A. from S pole to N pole B. from N pole to S pole C. in random directions D. in circles only Answer: B
- Which material is best for the core of a switchable electromagnet? A. steel B. copper C. soft iron D. plastic Answer: C
- Where is a magnetic field strongest around a bar magnet? A. in the middle B. where the field lines are closest together C. far from the magnet D. where the lines are furthest apart Answer: B
- Which is a non-magnetic material? A. iron B. steel C. cobalt D. copper Answer: D
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
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Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Simple Phenomena Of Magnetism? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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