Electricity & Magnetism

How much power can be generated by a current of 6 amps flowing across a potential difference of 25 volts.?

• 1.2 watts

• 0.24 watts

• 4.2 watts

• 150 watts

Calculate the amount of current in your fingers if they touch the terminals of a 12V battery when the resistance of your skin is 650 Ω

• 0.018 amps

• 54 amps

• 7800 amps

• Can’t be determined from information given

What is the potential difference if a resistance of 25 ohms produces a current of 200A?

• 2500 volts

• 20 volts

• 15 volts

• 5000 volts

All magnets generate

• a north pole

• a magnetic field

• direction forces

• force resistance

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Batteries typically have

• One positive and one negative terminal

• Two negative terminals

• Two positive terminals

• No terminals

Electric force varies depending on the

• Charge and distance between charged objects

• Charge and mass of charged objects

• Height and mass of charged objects

• Mass and distance between charged objects

Tags

NGSS.HS-PS2-4

Positive charges _____________ one another

• Attract

• Cancel

• Repel

• join

Tags

NGSS.HS-PS3-5

Electric field lines show the strength and _____________ of an electric field.

• Polarization

• Friction

• Temperature

• Direction

Tags

NGSS.HS-PS3-5

The electric field between two objects ___________________ when the distance between them decreases.

• Increases

• Decreases

• Remains constant

• None of the above

Tags

NGSS.HS-PS2-4

An electric cell is a source of electric current because of a ______________ between the terminals.

• Resistance

• Light bulb

• Semiconductor

• potential difference