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ELECTRCITY

Total questions: 20

Worksheet time: 25mins

Name
Class
Date
1.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
2.
An object becomes charged when the atoms in the object gain or lose
a)
electrons
b)
protons
c)
neutrons
d)
all of the above
3.
A region around a charged particle that can exert a force on another charged particle is called an
a)
electric pulse.
b)
electric charge.
c)
electric force.
d)
electric field.
4.

Will the balloons ATTRACT or REPEL each other?

a)
b)
5.
What method of static charging is shown in this picture
a)
Polarization
b)
Friction
c)
Induction
d)
Conduction
6.
If an object has the same number of positive and negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
7.

What is an electric current?

a)

a build up of electrons

b)

the difference in charge between 2 points

c)

the flow of electrons over a circuit

d)

the opposition to flow of electrons

8.

Atoms contain ____ types of subatomic particles.

a)

1

b)

2

c)

3

d)

4

9.

What is found in the nucleus of an atom?

a)

protons and electrons

b)

neutrons and electrons

c)

protons and neutrons

10.

The following is the formula for ______________________.

Fe = q x E

a)

Friction

b)

Electric Force

c)

Charge

11.
What electrical symbol is this?
a)
Open Switch
b)
Closed Switch
c)
Lightbulb
d)
Battery
12.

The Law of Conservation of Energy states:

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed

c)

Energy can't be created, destroyed or transformed

d)

Energy cannot be created or destroyed.

13.

What force causes a roller coaster cart to slow down the most?

a)

friction

b)

weight

c)

gravity

d)

air resistance

14.

What is happening to the ice skater?

a)

Decreased Angular velocity, decreased rotational inertia

b)

Decreased Angular velocity, increased rotational inertia

c)

Increased Angular velocity, increased rotational inertia

d)

Increased Angular velocity, decreased rotational inertia

15.
A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 
a)
5 m/s
b)
2.5 m/s
c)
10 m/s
d)
7.5 m/s
16.
In any collision (crash) the ______ is ALWAYS constant
a)
Total Momentum
b)
total speed
c)
total Velocity
d)
Energy
17.

Angular Momentum is the product of...

a)

rotational inertia and linear velocity.

b)

linear inertia and angular velocity.

c)

linear momentum and angular velocity

d)

rotational inertia and angular velocity.

18.

Analogue of mass in rotational motion is

a)

moment of inertia

b)

radius of gyration

c)

torque

d)

angular momentum

19.
When two objects collide, the Pbefore is ____________ the Pafter.
a)
more than 
b)
less than 
c)
equal to
d)
unrelated to
20.

According to Newton's Laws, for every action there is an ....

a)

equal and opposite reaction.

b)

equal and parallel reaction.

c)

unequal and opposite reaction.

d)

unequal and unrelated reaction.