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Magnetic and Non Magnetic Materials

Fill in the b...

Question

Fill in the blanks with the correct words.
1. Materials that completely block the light are called ___________ (translucent/opaque).
2. Electric ............... (current/switch) is a device that is used to open or close a circuit.
3. ...................... (Permanent/Temporary) magnets retain their magnetic properties for long period of time.
4. The distance of something from one end to the other is called ................ (length/weight).
5. ................... (Nitrogen/Oxygen) gas is the most abundant in air.

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Solution

1. Materials that completely block the light are opaque.
2. Electric switch is a device that is used to open and close a circuit.
3. Permanent magnets retain their magnetic properties for a long period of time.
4. The distance of something from one end to the other is called length.
5. Nitrogen gas is the most abundant gas in air.

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Q. Fill in the blanks with the correct words.
1. Only ..................... (magnetic/non-magnetic) materials are attracted by magnets.
2. Like poles of two magnets ..................... (attract/repel) each other.
3. A magnet that retains its properties for a very long period of time is called ..................... (electro/permanent) magnet.
4. A horseshoe magnet should be stored with a piece of ..................... (plastic/iron) across its poles.
5. A ......................................... (credit card/magnetic compass) is a devicer used to find directions.

Q. Fill in the blanks:
1. An electric circuit is a closed path in which ............................. flows.
2. A solenoid carrying current behaves like a ............................. .
3. The space around a magnet where its influence can be experienced is called the ............................. .
4. The combination of two or more cells is called a ............................. .
5. When current is switched 'on' in a room heater, it gets ............................. .
6. The safely device based on the heating effect of electric current is called a ............................. .

Q. Fill in the blanks with the correct words.
1. Hand span is the distance between the tip of the thumb and the ........................ (tip of the little finger/arms).
2. ........................ (Iron/Wood) is a magnetic material.
3. A ........................ (clear glass/mirror) is an example of a transparent object.
4. Common sources of electric current are ........................ (cells/switch).
5. Abnormally long period of no rainfall is called ........................ (drought/flood).

Fill in the blanks:

(a) A device that is used to break an electric circuit is called a ______ __.

(b) An electric cell has ______ __ terminals.

Q. Assertion :Substances which at room temperature retain their ferromagnetic property for a long period of time are called permanent magnets. Reason: Permanent magnet can be made by placing a ferromagnetic rod in a solenoid and passing current through it.

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