ĐIỆN tử VIỄN THÔNG DTVT2 nhom3 bai3 khotailieu

There are two kind of batteries: primary cell non-rechargeable, secondary cell rechargeable.. List of the things contain batteries: mobile phone, radio, flashlingt, tape recorder, robot,

Batteries

Task 1:

1 Because energy consumption is essential

2 There are two kind of batteries: primary cell (non-rechargeable), secondary cell (rechargeable)

3 List of the things contain batteries: mobile phone, radio, flashlingt, tape recorder, robot, clock…

Task 2:

Zinc-carbon cell Nicad cell Type of cell Primary Secondary

Positive Manganese dioxide Nickel

Negative electrode Zinc Cadium

Example Torches Portable phone

Task 4:

Zinc-carbon cell Nicad cell Electrolyte A solution of ammonium chloride Potassium hydroxide

Task 5:

1 C It’s a resistor It adds resistance to a circuit.

2 G It’s a potentiometer It varies the current in circuit

3 H It’s a transformer It steps AC voltages up or down

4 E It’s a switch It breaks a circuit

5 B It’s a diodes It rectifies alternating current

6 J It’s a voltmeter It measures voltages

7 A It’s a capacitor It varies capacitance in a circuit

8 F It’s a fuse It protects a circuit

9 D It’s a mini ammeter It measures very small current

10 I It’s a aerial It receives RF signals

Task 8:

Oscillate Oscillator Transmit Transmitter Transform Transformer Charge Charger Rectify Rectifies Process Processor Amplify Amplifies Colect Collector Detect detector Turn Turner

neon lamp transformer

rectifiers electrolytic capacitor

resistor zener diode fuse

double pole switch transistor

Task 10:

1 a

2 h

3 d

4 f

5 g

6 c

7 e

8 b