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FSS - INTERGRATED SCIENCE > F2 - SEM1 - Circuit - 8.2 Current > Flashcards

F2 - SEM1 - Circuit - 8.2 Current Flashcards

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1
Q

Fill in the blank

Current is a flow of ___________

8.2 Current

A

Electrons

8.2 Current

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2
Q

Fill in the blank

Thermal energy is given out when a current passes through a conductor. This demonstrates the _________________of current.

8.2 Current

A

Heating effect

8.2 Current

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3
Q

What is flowing in a closed circuit when the bulb lights up?

8.2 Current

A

electrons

8.2 Current

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4
Q

How is the current flow?

8.2 Current

A

Positive terminal of a cell -> Negative terminal of a cell

8.2 Current

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5
Q

What is the function of an ammeter?

8.2 Current

A

Measure the size of electric current

8.2 Current

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6
Q

What is the unit of current?

8.2 Current

A

Ampere (A)

8.2 Current

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7
Q

How to connect the ammeter to a circuit?

8.2 Current

A

The red knob should lead to the positive
The black knob should led to negative

8.2 Current

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8
Q

What will happen if connecting the ammeter across the cell directly?

8.2 Current

A

A large current may flow through the ammeter => damage the ammeter

8.2 Current

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9
Q

What will happen if connect the red knob of ammeter to negative and black knob to positive?

8.2 Current

A

The ammeter may get damaged

8.2 Current

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10
Q

What is the size of each of the below?

Electric portable fan
Induction cooker
Lightning bolt

8.2 Current

A

Electric portable fan - 1A
Induction cooker - 10A
Lightning bolt - 30,000A

8.2 Current

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11
Q

What is current?

8.2 Current

A

Flow of electric charges

8.2 Current

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12
Q

True or False?

When an electrical appliance is connected in a circuit, the current stops after passing through the appliance?

8.2 Current

A

False
In a closed circuit, current flows through the whole circuit

8.2 Current

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13
Q

In water flow model, What is the corresponding part and its function in the electric circuit?

  • Pump
  • Water flow
  • Turbine
  • Water pipe

8.2 Current

A
  • Pump - cell, supplies energy
  • Water flow - current, transfer energy
  • Turbine - bulb, consumes energy
  • Water pipe - connecting wire, provides path for water flow / current

8.2 Current

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14
Q

What happen to the conductor when a current passes through?

8.2 Current

A

The temperature of the conductor increases
because some electric energy is changed to thermal energy

8.2 Current

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15
Q

Give an example of conductor that can be used in the heating effect of electric current experiment

8.2 Current

A

Nichrome wire

8.2 Current

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16
Q

What are needed in the heating effect of electric current experiment?

8.2 Current

A
  • Power supply
  • Connecting wire
  • Coiled nichrome wire
  • Ammeter
  • Wax

8.2 Current

17
Q

In the heating effect of electric current experiment, what happened when the voltage output of the power supply increased?

8.2 Current

A

The electric current increased

8.2 Current

18
Q

Explain heating effect of the current

8.2 Current

A

Thermal energy is given out when a current passes through a conductor.

8.2 Current

19
Q

Give an example of using heating effect and explain how.

8.2 Current

A

Electric kettle
1. The current passes through the kettle circuit —>
2. The heating parts inside the kettle become hot —>
3. boil water

8.2 Current

20
Q

What happen when a current passes through a coil of wire wound around an iron nail?

8.2 Current

A

The nail works like a magnet (electromagnet)

8.2 Current

21
Q

How to increase the magnetic effect of current?

8.2 Current

A

The coil is wound around an iron core

8.2 Current

22
Q

Give an example and explain of how electromagnet can be used in daily life.

8.2 Current

A

Electromagnetic crane, lift / attract heavy magnetic object such as iron scraps
Consists of a coil of thousands of turns of wire around an iron core

8.2 Current

23
Q

True or False?

Current can turn a plastic coil into an electromagnet

8.2 Current

A

False
Current can turn coil of wire into an electromagnet

8.2 Current

24
Q

What are needed in the magnet effect of electric current experiment?

8.2 Current

A
  • Circuit board
  • Power supply (cells)
  • Connecting wire
  • Connector
  • Switch
  • Long iron nail
  • Insulated copper wire
  • Paper clip

8.2 Current

25
Q

Draw component symbols

Ammeter

8.2 Current

A

8.2 Current

FSS - INTERGRATED SCIENCE (35 decks)

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