Question

VII ASSESSEMENT---2

ELECTRIC CURRENT AND ITS EFFECTS

I. CHOOSE THE BEST ANSWER:

1.The unbroken path through which electric current passes is called

a. closed circuit b. open circuit c. electric fuse

2.A Filament of electric bulb is made up

a. Tungsten b.Nichrome c.Lead

3. An electric heater works on the principle of the --------effect of electric current

a. chemical b. heating c. melting

4. In which of the following is a wire with a low melting point used

a. Electric bell b. Electric fuse c. Electromagnet

5.Which of these does not use an electromagnet for its working

a. Electric bulb b. Electric bell c. Television

II. Fill in the blanks:

1. Electric current flows through a circuit only when it is ---------

2. An electric bulb gets -------due to the current flowing through its filament.

3. A current carrying wire develops a -----------field around it.

4. A -------- -is a safety device used to protect appliance and circuit from damage

due to excess current.

5.The element of a hot plate is made of a conducting material with a -----------melting

III Name the following:

1.The diagram that represents an electric circuit

2.An electrical component that acts as a source of electricity in a circuit.

3.An example of a safety device used in an appliance

IV Answer the following:

1. List three uses of electromagnet

2. Draw circuit diagram for open and closed circuit​

Answer 1

Answer:

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