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cl7 (physics)

Total questions: 20

Worksheet time: 14mins

Name
Class
Date
1.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
2.
What is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
3.

which type of wool is common in Tibet and Laddakh?

a)

yak wool

b)

sheep wool

c)

Angora wool

d)

pashmina wool

4.

Wool & silk are-

a)

Animal fibre

b)

Plant fibre

c)

Synthetic fibre

d)

Synthetic nylon

5.

Wool is obtained from the ____ of sheep.

a)

Silk

b)

Sheep

c)

Fibre

d)

Fleece

6.

The process of washing of sheared skin with hair in tanks to remove any kind of dust, dirt or grease is called

a)

shearing

b)

reeling

c)

scouring

d)

dyeing

7.

Pashmina shawls are obtained by the under fur of ________.

a)

Yak

b)

Llama

c)

Alpaca

d)

Kashmiri goat

8.
Heat transfer in the image.
a)
conduction
b)
convection
c)
radiation
9.
Heat transfer in boiling water.
a)
Conduction
b)
Convection
c)
Radiation
10.
On a cold rainy day a baby is touching a cold window.  It feels so cold. Which way is the heat moving moving? 
a)
Cold is moving from the window to the hand.
b)
Heat is moving from the hand to the window.
c)
Heat doesn't move.
d)
It moves in currents
11.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
12.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
13.

The given circuit is an example of __________ effect of electric current

a)

Magnetic effect

b)

Heating effect

c)

Chemical effect

14.

When current is passed through a wire, it behaves like

a)

Conductor

b)

Magnet

c)

Insulator

15.

Rajan made an electromagnet by winding 50 turns of the wire over an iron screw. Priya also made an electromagnet by winding 100 turns of the wire over an iron screw. which electromagnet will attract more pins?

a)

Rajan's Electromagnet

b)

Priya's Electromagnet

c)

Both attract same number of pins

16.

The magnetic strength of a conductor decreases with the increase in current

a)

True

b)

False

c)

None of the above

17.

filament of a bulb should have

a)

high melting point

b)

low melting point

18.

filament of a bulb is usually made up of

a)

nickel

b)

chromium

c)

cobalt

d)

tungsten

19.

Which is this type of circuit?

a)

Open circuit

b)

Closed circuit

c)

Both of these

d)

None of these

20.

Fuse works based on the

a)

heating effect of electric current

b)

magnetic effect of electric current

c)

Lighting effect of electric current

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