Worksheetsnatural phenomenon
Total questions: 20
Worksheet time: 15mins
When a body gains electrons, it acquires
positive charge
negative charge
Partial positive
partial negative
Electroscope is an instrument used to find teh quantity of charge on different bodies.
true
false
Accumulation of charges causes __________in the clouds.
rainn
earthquake
lightning
storm
Lightning occurs because of
Rain
elelctric discharge
wind
shaking of earth
.................was the first to discover that lightning is electric discharge.
Thomas Alva Edison
Nicolas Tesla
Benjamin Franklin
Isaac Newton
Franklin showed that........and the spark from our clothes during winters are the same phenomenon.
Thunderstorm
earthquake
lightning
rain
When on large scale, negative and positive charges meet in clouds, we experience:
Streak of bright light and sound
thunderstorm
lightning
all of the above
The objects which acquires small electric charges, when rubbed with each other, are called:
elelctric objects
charged objects
neutral objects
none
Seismic waves are recorded by an instrument called seismograph.
true
false
Lightning conductors are used to save the building from earthquakes.
true
false
Lightning conductor is made of copper.
true
false
When an ebonite rod is rubbed with fur, the electrons move from ebonite to fur.
true
false
WHen a glass rod is rubbed with dry silk cloth, the electrons move from glass to silk.
true
false
Why is earthing done in buildings?
To protect us from elelctric shocks.
To give extra strength to the building.
To transfer extra current to air.
none
During the thunderstorm, .................move upwards while.................move downwards.
water droplets, air current
air current, charges
air current, water droplets
water droplets, charges
Where is the lower end of a lightning conductor fixed in the building?
at the top
at the window
at the base
in the ground
Lightning is caused in the atmosphere primarily due to
opposite charges accumulation at edges of a cloud.
discharge between two similarly charged clouds.
discharge between one charged and one neutral cloud
none
What is a positive charge?
the charge acquired by a glass rod when it is rubbed with silk.
the charge acquired by silk when it is rubbed with glass rod.
the charge acquired by a plastic straw when it is rubbed with silk.
none
Which of the following cannot be charged easily by friction?
plastic scale
copper rod
inflated balloon
wollen cloth.
What is the nature of electric charges generated by rubbing two objects?
static
mobile
positive
negative
