Charge current and voltage

Select the unit for current

• C/s

• Cs

• A/s

What 'flows' in a wire?

• Protons
• Neutrons
• Atoms
• Electrons

Tags

NGSS.HS-PS2-5

Voltage is simply defined as...

• what 'pushes' electrons
• what 'stops' electrons
• moving electrons

A large lightning bolt can carry up to 120000 A and 350 C. Calculate the time for which the current flows. 

• 2.92 s

• 0.0092 s

•  $2.92\times10^{-3}\ \min$ 

•  $2.92\times10^{-3}$ s

Tags

NGSS.HS-PS2-5

Which symbols are used for the units of current and of resistance?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

There is a current of 3.0A in a resistor for time t. During time t, a charge of 120C flows through the resistor.

What is time t ?

• 0.025 minutes

• 0.025 s

• 40 minutes

• 40 s

If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?

• 5 V
• 12 V
• 0.2 V
• 20 V

According to this law, the current in a circuit equals the voltage difference divided by the resistance. 

• Law of Conservation of Energy 
• Ohm's Law 
• Law of Conservation of Charges
• Newton's First Law 

If a positive charge is brought near a negative charge, the charges will

• repel each other

• attract each other

• explode

• create a rift in the space-time contiuum

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The voltage of a circuit that has a resistance of 10 ohms and a current of 1.5 A is

• 15 V

• 0.15 V

• 6.7 V

• None of these