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Electricity and its Effects

Total questions: 40

Worksheet time: 21mins

Name
Class
Date
1.

Which of the following devices does not work on heating effect of current?

a)

electric bulb

b)

fuse

c)

electric bell

d)

immersion rod

2.

On what principle is electric bell based?

a)

heating effect of current

b)

magnetic effect of current

3.

What is the full form of MCB?

a)

Miniature Circuit Board

b)

Miniature Circuit Breaker

c)

Multimeter Circuit Board

4.

What is the direction of conventional current flow?

a)

from positive terminal to negative terminal

b)

from positive terminal to positive terminal

c)

from negative terminal to positive terminal

d)

from negative terminal to negative terminal

5.

Which wire would have more resistance?

a)

long and thick

b)

short and thick

c)

long and thin

d)

short and thin

6.

In which wire, the heat produced would be minimum?

a)

Copper wire of length 10 cm

b)

Copper wire of length 20 cm

c)

Nichrome wire of length 10 cm

d)

Tungsten wire of length 20 cm

7.

Identify correct statements. (Select all correct options)

a)

The filament type electric bulbs are  power-efficient.

b)

CFLs do not work on the heating effect of current.

c)

CFLs are more expensive than electric bulb.

d)

CFLs consume more electricity than electric bulb.

8.

Electric fuse, when gets heated too much, breaks

a)

electrical appliances

b)

electric current

c)

electric circuit

d)

short-circuit

9.

Which of the following devices work on heating effect of the current? (Select all correct options)

a)

Electric bulb

b)

Electric iron

c)

Electric bell

d)

Fuse

e)

immersion rod

10.

Which of the following devices work on heating effect of the current? (Select all correct options)

a)

Electric oven

b)

Loudspeakers

c)

Cranes with strong electromagnet

d)

Telegraph

e)

Electric kettle

11.

What is true about electromagnets? (Select all correct options)

a)

Their magnetism can be altered

b)

When electric current is switched off, it does not behave like a magnet.

c)

They cannot be as strong as a permanent magnet

d)

Magnetism in electromagnet is natural.

12.

What are the factors on which the strength of an electromagnet depend?

a)

1. number of turns of the coil

b)

2. strength of electric current

c)

3. both 1 and 2

13.

Who discovered the electric cell?

a)

Hans Christian Oersted

b)

Alessandro Volta

c)

Thomas Edison

d)

Alexander Graham Bell

14.

Which of the following is used as a safety device?

a)

Resistor

b)

Bulb

c)

Fuse

d)

Switch

15.

Which mark is present on electric appliances to ensure their safety?

a)

MCB

b)

FSSAI

c)

ECB

d)

ISI

16.

Which works on the heating effect of electricity.

a)

Gas chulha

b)

Chimney

c)

Electric Bell

d)

None of These

17.

Who discovered Magnetic effect of current?

a)

Nikola Tesla

b)

Charles Lyell

c)

Hans Christian Oersted

d)

Charles Darwin

18.

Which works does not work on magnetic effect of current

a)

Both A and B

b)

Electric bell

c)

Electromagnet

d)

Electric Heater

19.

Which part of the electric bell gets attracted towards the electromagnet

a)

Hammer

b)

Gong

c)

Iron Strip

d)

rod

20.

What does a fuse do?

a)

Melt down for no reason.

b)

Stop electricity

c)

Stop excessive electricity

21.

What is this?

a)

Battery

b)

Electromagnet

c)

Soleoid

d)

Solenoid

22.

What are the effects of electricity?

a)

Chemical effect

b)

Magnetic effect

c)

Heating effect

d)

Illuminating effect

23.

What are incandescent bulbs?

a)

Bulbs with mercury vapour

b)

Bulbs tungsten filament

c)

Bulbs with light emitting diodes

24.

What is the full form of the ISI mark?

a)

Indian standard institution

b)

India standards institutions

c)

Indian Standards institution

25.

Who developed the ISI mark?

a)

Bureau of India standard

b)

Bureau Indian standards

c)

Bureau India standard

d)

Bureau of Indian Standards

26.

What kind of products contain ISI mark?

a)

Electrical appliances

b)

Switches,Motors,Wiring Cables

c)

Computers,Mobiles

27.

Electrons are____________particles

a)

Positive

b)

Negative

c)

Positively charged

d)

Negatively charged

28.

When two or more cells are joined together it forms a

a)

Dynamo

b)

Radio

c)

Transistor

d)

Battery

29.

When does an electromagnet lose its magnetic Property?

a)

When current is very high

b)

When its switched off

c)

When heat is very high

d)

When current is switched on

30.

What is an electromagnet based on ?

a)

Magnetic effect

b)

Electric current

c)

Magnetic effect of electric current

d)

Electro-chemical effect of current

31.
A circuit made of wires, a lamp, a switch, and a cell is shown at the right. What change is needed for the lamp to glow? 
a)
The switch needs to be opened.
b)
The switch needs to be closed.
c)
The cell needs an insulator.
d)
The wire needs to be connected to the bottom of the cell.
32.
Which property of wood makes it a good material for the handle on a cooking tool? 
a)
Wood is a natural material. 
b)
Wood is unaffected by metal. 
c)
Wood conducts heat well. 
d)
Wood does not conduct electricity well.
33.
Mary-Alice likes to bring her coffee to work each morning.  However, she wonders what the best cup to bring would be if she wants her coffee to stay warm.  Which of the following materials would keep Mary-Alice’s coffee warm the longest? 
a)
paper
b)
Styrofoam
c)
 plastic
d)
 glass
34.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
35.
The continuous flow of electric charges through a material is called...
a)
Electric Field
b)
Electric Force
c)
Electric Current
d)
Electric Circuit
36.

What kind of circuits allow the movement of electrical energy?

a)

broken circuits

b)

short circuits

c)

open circuits

d)

closed circuits

37.
Circuits in your home, school, or other buildings are _____________ circuits.
a)
series
b)
parallel
c)
short
38.
What happens when the circuit is open?
a)
light bulb comes on
b)
device won't work
c)
static discharge
d)
lightning
39.
In most electrical circuits, the pathway is made of:
a)
Wood
b)
Plastic
c)
Metal
d)
Static
40.

A glowing filament will be

a)

At a low temperature

b)

At a high temperature

c)

At atmospheric temperature

d)

At the temperature of ice

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