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WorksheetsElectro-Magnetic Theory
Total questions: 15
Worksheet time: 9mins
Glass rod when rubbed with silk, takes electrons from the silk. This makes the silk become...
No charge
Negatively charged
Positively charged
Imbalance between negative and positive charges gives rise to...
Resistance
Static electricity
Electric current
Electric potential
The unit of electric charge is
Tesla
Faraday
Volts
Coulomb
Magnetic force is a _____ and _____ force.
non-contact
contact
invisible
visible
A changing (a) field can give rise to (b)
Magnets generated due to flow of current are known as...
Electromagnets
Magnetic Flux
Electrodynamics
Permanent magnet
The magnetism of a permanent magnet is lost forever if we ______ it.
play with
heat
break
What are the variables in solenoid?
Number of turns of the coil
Amount of current through the wire
Core material inside the solenoid
Surrounding gas
Electromotive force is a
Force exerted due to electric and magnetic fields
Force exerted due to electric field only
Force exerted due to the motion of an electron
Force exerted due to the motion of the magnet
In Fleming's left-hand rule, index finger indicates the direction of
Magnetic field
Current
Thrust
Motion
This is used to operate a switch in the car starter motor.
Ferrite
solenoid
electrostatics
magnetic pendulum
If two balloons have the same charge, what will happen if you place them close to each other?
Nothing
They will pop
They will push each other away.
They will be attracted
Assume a rubber rod is rubbed against a rabbit fur and gains 5 electrons. Which of the following is true?
The fur lost 5 electrons.
The fur gained 5 protons.
The fur gained 5 electrons.
The fur lost 2 electrons.
The lines of magnetic force are
Always curved
Always straight
Sometimes curved
None of the above
What is the name of this device that is used to detect charges?
photometer
turgometer
electroscope
chronoscope
