Voltage Drops

In the equation V=IR, the V stands for _____________.

• Voltage

• Current

• Resistance

• Vendetta

Voltage is measured in what?

• Ohms

• Amperes

• Volts

• Watts

Select the correct statement:

• The current in parallel resistors is always equal.

• The sum of the sources of EMF and volt-drops in a closed loop is zero.

• The sum of the currents in a closed loop is zero.

• The sum of the voltages at a node is zero.

What does Kirchhoff's second law show?

• conservation of charge

• conservation of energy

• In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference).

• The sum of the current entering a junction is the sum of the current leaving the junction.

The nano-sized tractor moves a charge across the resistor with the shown current. Will the charge gain or lose energy?

• + ΔV

• - ΔV

• varying potential difference

• Can't tell from the given information.

Tags

NGSS.HS-PS3-1

Is the potential at "B" higher or lower than "A's" potential? (for 3 points)

• "B" is higher than "A"

• "B" is lower than "A"

• Can't tell from the given information.

What is the unit of voltage drop in an electrical circuit?

• Ohms

• Amperes

• Volts

• Watts

In a series circuit, how does the voltage drop across each resistor compare?

• It is the same across all resistors

• It is zero across all resistors

• It is proportional to the resistance of each resistor

• It is inversely proportional to the resistance of each resistor

Which law is used to calculate the voltage drop across a resistor?

• Ohm's Law

• Newton's Law

• Faraday's Law

• Coulomb's Law

If a circuit has a total voltage of 12V and two resistors in series with resistances of 2Ω and 4Ω, what is the voltage drop across the 4Ω resistor?

• 2V

• 4V

• 6V

• 8V