Question

Q1.Fill in the blanks:
1. A combination of two or more cells is called a _____________ .
2. The working of a an electric bulb, electric iron and the fuse is based on the
__________________ effect of current.
3. The filament of an electric bulb is made of ______________ and has
______________ (high/low) melting point.
4. Instead of electric bulbs, it is advisable to use ______________ and
__________________, in order to reduce wastage.
5. __________ is a safety device which prevents fires and damage to electricalQ1.Fill in the blanks:
1. A combination of two or more cells is called a _____________ .
2. The working of a an electric bulb, electric iron and the fuse is based on the
__________________ effect of current.
3. The filament of an electric bulb is made of ______________ and has
______________ (high/low) melting point.
4. Instead of electric bulbs, it is advisable to use ______________ and
__________________, in order to reduce wastage.
5. __________ is a safety device which prevents fires and damage to electrical ​appliances.
6. A current carrying coil wrapped around a piece of iron is called an __________.
7. ________________ performed experiments to prove the magnetic effect of
current.
8. _________________ and _____________ are devices which have
electromagnets in them.
Q2. Draw the symbols for the following:

Answer 1

Answer:

Explanation:

1.  A combination of two or more cells is called a BATTERY

2. The working of a an electric bulb, electric iron and the fuse is based on the

THERMAL effect of current.

3. The filament of an electric bulb is made of TUNGSTEN and has

HIGH melting point.

4. Instead of electric bulbs, it is advisable to use CFL and

LED Bulbs, in order to reduce wastage.

5. FUSE is a safety device which prevents fires and damage to electrical ​appliances.

6. A current carrying coil wrapped around a piece of iron is called an ELECTROMAGNET (SOLENOID)

7. Hans Christian Oersted performed experiments to prove the magnetic effect of current.

8. Motors and Generators are devices which have

electromagnets in them.

Answer 2

Answer:

Answer:

Explanation:

(a) The same kind of plants grown and cultivated on a large scale at a place is called CROP.

(b) The first step before growing crops is PREPERATION of the soil.

(c) Damaged seeds would FLOAT on top of water.

(d) For growing a crop, sufficient sunlight and WATER and NUTRIENTS from the soil are essential.

Kharif crop -  rice , bajra , arhar , soyabean, groundnut , cotton etc

Rabi crop - wheat, barley, oats , mustard etc

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