Electric Motor

Open Ended

Tulis Nama Lengkap dan Kelas

Open Ended

Discuss with your partner!
What do the tools in the picture have in common?
(apa kesamaan alat-alat dalam gambar)

The tools mentioned earlier all have electric motors. An electric motor helps convert electrical energy into mechanical energy. It is based on the principles of electromagnetism.

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What is electric motor?

​Construction of an electric motor

Match

Match the following

• Komponen X dan Y

• Komponen P dan Q

Sumber medan magnet

Sumber arus listrik

Kumparan berputar

Sikat penghubung arus & cincin berputar

Cincin berputar

• Sumber medan magnet

• Sumber arus listrik

• Kumparan berputar

• Sikat penghubung arus & cincin berputar

• Cincin berputar

• It has a rectangular coil of wire ABCD.

• It has got a strong horseshoe magnet. The coil ABCD is placed perpendicular to this magnet.

• The ends of the coil ABCD are connected to split rings P and Q. These split rings play the role of the commutator. It helps reverse the direction of the current flow.

• The inners part of the split rings is insulated. It is attached to the axle. The axle is free to rotate.

• The external side of the conducting edges of the split rings is connected with the stationary brushes. These brushes X and Y are connected with the battery. This completes the circuit.

​Replace this

Open Ended

Tuliskan secara singkat dan jelas hal-hal yang dipahami dari slide sebelum ini!

Multiple Choice

Ke mana arah gaya magnet pada kawat AB?

• atas

• bawah

• kanan

• kiri

Multiple Choice

Ke mana arah gaya magnet pada kawat CD?

• atas

• bawah

• kanan

• kiri

Open Ended

Tuliskan secara singkat dan jelas hal-hal yang dipahami dari slide sebelum ini!

Bagaimana menghitung momen gaya pada kumparan?

Multiple Choice

Rumus dasar menghitung momen gaya (M) adalah ...

• M = Fr

• M = F r cos q

• M = F r sin q

• M = F r / sinq

• M = F r / cosq

Rumus momen gaya pada kumparan?

Multiple Choice

Momen gaya pada kumparan dengan N lilitan, luas A, dialiri arus i, dan terletak dalam medan magnet B yang membentuk sudut q terhadap normal bidang kumparan adalah ...

• M = NABi cosq

• M = NABi sinq

• M = NABi tanq

• M = NABi / cosq

• M = NABi / sinq

Multiple Choice

• 4,8 x 10^-3

• 9,6 x 10^-3

• 4,8 x 10^-5

• 9,6 x 10^-5

• 9,6 x 10^-6

Keep working hard and stay humble!

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Congratulations for finishing the lesson!