changes electric energy to mechanical energy ………………….
electromagnet
electric motor
electric generator
dynamo
…………….. Dividing of the object’s weight by earth’s gravitational acceleration equals
object’s volume
object’s area
object’s mass
object’s weight
is a type of iron which is used in making an electromagnet ……………..
Wrought
Steel
Rough
None of the previous
Earth’s gravitational acceleration at two poles is………….. that at the equator.
Less than
More than
Equal to
…………………….. The idea of making dynamo is to
Change electric energy to magnetic energy
Change magnetic energy to electric energy
Change mechanical energy to electric energy
Change magnetic energy to mechanical energy
……………… Nuclear radiation that’s used in medicine is produced from
electromagnetic force
Gravitational force
Weak nuclear energy
strong nuclear energy
………………..weak nuclear force is used in the following except
producing electricity
medicine
scientific researches
industry
………………………. A force is can’t affect
A pen
A book
A wall
A ball
…………… electromagnet is used in making
electric lamp
radio
watch
electric bell
if the weight of an object is 420 newton and the earth gravitational acceleration is 10m/sec2. It’s mass is………….Kg
24
42
0.42
4.2
………….. Electromagnetic force is used in
car
Washing machine
………… Which of the following is from fundamental forces in nature .
electromagnetic
inertia
friction
none of the previous
Weight is directly proportional to…………..of the object.
area
density
mass
volume
…………… A force which is responsible for getting radioactivity is
Electromagnetic force
Friction
Inertia
Nuclear
……………on passing electricity through a wrought of iron bar, it changes into
motor