Worksheetsmagnetic effects of electric current
Total questions: 17
Worksheet time: 5mins
A compass needle is
temprorary magnet
horse shhoe magnet
bar magnet
solenoid
draw the magnetic field lines for the bar magnet
magnetic feild is
a imaganery quantity
vector
scalar
both a and b
NO two field lines are found to cross each other .if they did....
it would mean that outside the point of intersection the compass needle point towards to directions.
the like poles will attract each other
the unlike poles would repel
none of these
what happens to the magnetic feild when no current is passed
the iron fillings assemble in concentric cirles
compass needle gets deflected
both a and b
there would be no magnetic field
what do the thumb figer pointand the remaing fingers point
the thumb points towards direction of magnetic field.others point towards direction of current
the thumb points towards direction of current.others point towards direction of magnetic field
the thumb points towards direction of force.others point towards direction of current
the thumb points towards direction of magnetic field.others point towards direction of force
which of these acts like a bar magnet
(a)
hose shoe magnet
circular loop
solenoid
both b and c
the magnet field adds up if
heat increases
wire increases
turn increases
all of the above
draw the magnetic field of circular loop
the direction of force o the conductor depends on the
direction of current and diection of magnetic field
dirction of field and amount of current
heat and direction of current
heat and direction of magnetis field
the force is maximum when diection of current is at ---------to the direction of magnetic field
parllel
perpendicular
180 degree
same direction
what is the rule,what to these fingers point
an electon eneter a magnetic field right hand to it. the direction of force on the electron will be...
to the right
to the left
towards you
away from you
what are the two different standards of circuits used
20 A
and 15 A
220A
and 110A
15 A
and 5 A
240 A
and 220 A
for what gadgets earth wire is used
high voltage gadgets
low voltage gadgets
gadgets which
are important and coslty
like ac ,fridge
gadgets with mettalic body
name any to precaution
fuse and earth wire
fuse and genrator
earth wire and generator
all three
an electrical oven of 2 kw power rating is operated in adomestic cirruit that has a current rating of 5 A .WHAT WILL HAPPEN
it will work
it will blast
the equipment and socket will be damaged
it will not wotk
