Unit 9: Current and Circuits

A positive charge of 1.5 x10^-8 C experiences a force of 0.025 N to the left in an electric field. What is the magnitude of the field? E = F/q'

• 1.7 x 10^6 N/C

• 2.0 x 10^6 N/C

• 3.4 x 10^6 N/C

• 1 x 10^6 N/C

Tags

NGSS.HS-PS2-4

An electric field produces forces that can _____.

• produce electric charges

• create energy

• do work

• run an engine

Tags

NGSS.HS-PS2-5

A test charge is used to _____ an electric field.

• create

• change

• measure

• destroy

What are electric field lines used for?

• to calculate the force on a charged body

• to find the direction of a current in space

• to explain why charged bodies exert a force on each other

• to determine the strength of an electric field

What did Millikan use a uniform electric field between two parallel plates to measure?

• charge of an electron

• electric fields near conductors

• the electric potential difference caused by X-rays

• the terminal velocity of a charged oil drop

Choose the correct term:

the quantity that relates the force exerted on a charge to the

size of the charge

• volt

• electric field strength

• equipotential

• capacitance

Tags

NGSS.HS-PS2-4

As an electric field becomes stronger, the field lines should be drawn ____ .

• closer together

• farther apart

• thicker

• thinner

What magnitude of force is exerted on a 19.9 C charge by an electric field of 4.54 x10^-4 N/C? F=Eq'

• 5.01 x 10^-3 N

• 4.5 x 10^-3 N

• 2.3 x 10^-3 N

• 4.1 x 10^-4 N

Tags

NGSS.HS-PS3-5

A 6.0-V battery delivers a 0.5 A current to an electric motor

connected across its terminals. What is the power of the motor? P=IV

• 14 W

• 2 W

• 7 W

• 3 W

A current of 0.50 A is carried through a lamp when it is connected to a 120-V source. What is the resistance of the lamp?

• 2.4 x 10^2 Ohms

• 5.5 x 10^2 Ohms

• 7 x 10^2 Ohms

• 1.5 x 10^2 Ohms