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WorksheetsPHYSICS FORM 5 CHAPTER 3
Total questions: 21
Worksheet time: 11mins
"a region around a magnetic material or a moving electric charge within which the force of magnetism acts".
This is definition of
magnetic field
magnetic charge
magnet
electromagnet
"a soft metal core made into a magnet by the passage of electric current through a coil surrounding it".
This is definition of
magnetic field
electromagnet
magnet
charge
For straight wire carrying conductor, we use _________ to determine the direction of magnetic field
right hand grip rule
Fleming's left hand rule
Fleming's right hand rule
For straight wire carrying conductor, we use right hand grip rule to determine _______.
direction of electric field
direction of magnetic field
direction of force
direction of current
For the right hand grip rule for a solenoid: The thumb points towards ________ of the magnetic field while
positive pole
south pole
north pole
negative pole
The right hand grip rule for a solenoid:
The thumb points towards north
pole of the magnetic field while
the other fingers indicate __________.
the direction of the electron flow in the solenoid
the direction of the pole in the solenoid
the direction of the magnet in the solenoid
the direction of the current in the solenoid
All of the following are application of electromagnet EXCEPT
microphone
circuit breaker
electric bell
ear phone
Fleming's left hand rule used to determine
direction of electric current
direction of pole
direction of magnetic force
direction of magnetic field
from your view, find the direction of magnetic force exert by the rod
to the right
to the left
toward you
away from you
When a current-carrying conductor is in a magnetic field of a permanent magnet, the interaction between the two magnetic fields produce ___________.
a current on the conductor
a force on the conductor
a electricity on the conductor
a pole on the conductor
How a current carrying conductor in a magnetic field experiences a force ?
The two magnetic fields interact to produce a resultant magnetic field.
The one fields interact to produce a resultant magnetic field.
The two electric fields interact to produce a resultant electric field.
The one electric fields interact to produce a resultant electric field.
The application of catapult effect is
microphone
generator
electric bell
direct current motor
_________ is the production of an electric current by a changing magnetic field.
Electromagnetic field
Electromagnetic induction
Electromagnetic conduction
Electromagnetic force
The induced current is produced only when there is ________ between the conductor / coil and the _______ lines.
relative motion.......magnetic field
magnetic field.......relative motion
current.......magnetic field
current.......relative motion
What is the pole of the X?
North
South
West
East
The magnitude of the induced current in solenoid can be increase by all of the following EXCEPT
increase the current in the coil
increase speed of movement
use stronger permanent magnet
increase number of turn
This is setup of
AC generator
DC generator
AC motor
DC motor
Nam the part labelled P
slip ring
commutator
carbon brush
galvanometer
All statement is correct for step up transformer EXCEPT
(P = power, V= voltage, N = number of turn)
NP>NS
NP<NS
VP<VS
PP=PS
A ________ is an electrical device which increases or decreases an alternating voltage based on the principle of electromagnetic induction.
generator
motor
transformer
circuit
This is the way to increase the efficiency of transformer EXCEPT
use thicker wire
Use laminated cores
Use cores made from soft iron
use thinner wire
