ELECTRIC FORCE
MAGNETIC FORCE
GRAVITATIONAL FORCE
ELECTROMAGNETISM
100
An object has a negative electrical charge when:
a) The sum of charges on the object equals zero
b) The sum of negative charges on the object is less than the sum of positive charges
c) The sum of positive charges on the object is less than the sum of its positive charges
c) The sum of positive charges on the object is less than the sum of its positive charges
100
These are Magnetic Materials EXCEPT:
Iron, Wood, Nickel, Cobalt, Plastic, Gold
Wood, Plastic and Gold
100
Pick from the following list the objects that exert a gravitational pull:
Baseball, Mountain, Planet, Galaxy, Black Hole
Baseball, Mountain, Planet, Galaxy, Black Hole
(remember that all objects with mass exert gravity)
100
Which experiment is this?
a) Oersted's b) Faraday's c) Tesla's
a) Oersted's
200
The strenght of an Electric Force is ________ to the product of the charges and _______ to the square of the distance
a) Inverse - Proportional
b) Proportional - Inverse
c) Proportional - Equal
d) Inverse - Equal
b) Proportional - Inverse
200
Pick the Pair of magnetic poles that correctly shows the magnetic attraction:
a) N --->S
b) S ---->N
c) S ---->S
d) N ---->N
a) N --->S
200
At what distance will be the gravitational force stronger?
a) 2x102 m
b) 2,000 km
c) 8x1024 m
d) 1 km
a) 2x102 m
200
Which experiment is this?
a) Oersted's b) Faraday's c) Tesla's
b) Faraday's
300
Two object with charges of - 2C and +4C will:
a) Attract equally
b) Repel unequally
c) Attract unequally
d) Repel equally
c) Attract unequally
300
If a Magnet N-S breaks in two pieces. The resultant magnets will be:
a) One magnet N and another S
b) One magnet N-N and another S-S
c) One magnet N-S and another S-N
c) One magnet N-S and another S-N
300
How much is the mass of an objects that sits with 4,500 N force on the surface of Mercury? g= 3.7 m/s2
W= m x g
1,216.2 Kg
300
What kind of Electromagnetic Device is this?
An electromagnet
400
What is the force of attraction between two objects with charges of -1x10-2 C and +2x10-2 C if they are placed 30 m away?
k= 9x109
- 2,000 N
400
Where is the Earth's magnetic South?
a) On Geographical North Pole
b) On Geographical South Pole
c) On the Equator of the Earth
a) On Geographical North Pole
400
A person is pulled with 450 N of Weight on the surface of Earth. With how much force will the same person will be pulled on Saturn?
gearth= 9.8 m/s2
gsaturn= 11.2 m/s2
W = m x g
514.1 N
500
At what distance should two charged objects must be places in order to be repeled with a force of 10,000 N? q1= 2 C, q2= 4 C. K= 9x109
2,683.3 m
500
How much will the force of attraction between a 80 kg person and the Earth will be?
mearth= 5.972x1024 kg
G = 6.67x10-11
Earth's radius = 6,381,000 m
782.6 N