Click the correct answer (True or False).
Click the correct answer.
Which of the following metals are used to make a fuse wire?
Copper and tin
Lead and tin
Copper and lead
Aluminium and copper
What does MCB stand for?
Miniature current breaker
Miniature current blocker
Miniature circuit breaker
Miniature circuit blocker
Which of these is not true for an atom?
An atom consists of electrons, protons and neutrons.
The nucleus of an atom comprises of protons and neutrons.
The electrons remain stationary around the nucleus in orbits.
Protons and neutrons remain stationary due to strong forces of attraction.
Which of the following is most correct about conductors?
Conductors have no free electrons .
Conductors have a few number of free electrons.
Conductors have a large number of free protons.
Conductors have a large number of free electrons.
Which of the following is not a method of charging an electrically neutral body?
Friction
Conduction
Convection
Induction
Which of these is not true about a thundercloud?
Charges within a thundercloud get separated due to water vapour.
A thundercloud carries static charges.
The upper part of the cloud carries positive charges.
The lower part of the cloud carries negative charges.
Click the correct answer.
If many appliances are connected to a single socket, this may lead to
.
overloading
short circuit
voltage fluctuation
electrocution
1 W =
1 J s
1 J s-1
1 J-1 s
4.2 J s-1
A nucleus of an atom contains
.
electrons and protons
protons and neutrons
electrons and neutrons
only protons
When the electric charges are build-up on the surface of an object, it is called
.
current electricity
static electricity
hydro electricity
thermal electricity
When a glass rod is rubbed with silk cloth, both glass rod and silk cloth
.
acquire equal and similar charges
acquire equal and opposite charges
acquire unequal and opposite charges
acquire unequal and similar charges
A/An
is a device used to find whether a given object is charged or not.
lightning conductor
miniature circuit breaker
electric fuse
electroscope
