Click the correct answer (True or False).
Click the correct answer.
Which of the following devices is used by the mariners and navigators to find geographical directions?
Electromagnet
Ammeter
Galvanometer
Magnetic compass
What is the flow of electric charge through a conductor called?
Heat
Electric current
Light
Wind
On which of the following effects of current, an electromagnet works?
Heating effect of current
Magnetic effect of current
Chemical effect of current
Attractive effect of current
Which of the following is not a primary cell?
Storage cell
Voltaic cell
Daniel cell
Leclanché cell
What is the path followed by the electric current called?
Conducting wire
Open circuit
Electric circuit
Electric current
Click the correct answer.
A freely suspended magnet always points in the
direction.
north-west
south-east
north-east
north-south
The frequency of the ringing of an electric bell can be altered with the help of the
.
armature
hammer
contact spring
adjustment screw
is the true test of magnetism.
Attraction
Direction
Repulsion
Protection
On increasing the strength of an electric current, the number of magnetic lines of force
.
increases
decreases
remains the same
becomes unpredictable
The strength of the magnetic field of a/an
can be changed when required.
bar magnet
horse-shoe magnet
electromagnet
magnet made by single touch method
A dry cell converts chemical energy into
energy.
electrical
magnetic
kinetic
mechanical
When the path of flow of current is broken, the circuit is called an
circuit.
closed
open
series
parallel
