Understanding Wheatstone Bridge

What is the primary purpose of a Wheatstone Bridge?

• To measure power

• To determine an unknown resistor

• To measure current

• To measure voltage

How does a voltmeter behave in a circuit?

• As a closed switch

• As a capacitor

• As an open switch

• As a resistor

What is the equivalent resistance on the left side of the circuit?

• 8 ohms

• 6 ohms

• 4 ohms

• 2 ohms

What is the current flowing through each resistor on the left side of the bridge?

• 4.5 amps

• 1.5 amps

• 3.0 amps

• 2.25 amps

What is the potential difference across the 1 ohm resistor on the left side?

• 4.5 volts

• 2.25 volts

• 1.5 volts

• 3.0 volts

If the voltmeter reads 1 volt, what are the possible potentials at the point in question?

• 8.75 volts or 10.75 volts

• 7.75 volts or 9.75 volts

• 6.75 volts or 8.75 volts

• 5.75 volts or 7.75 volts

What is the potential at the point if there is a 1 volt drop across the bridge?

• 5.75 volts

• 4.75 volts

• 6.75 volts

• 7.75 volts

What is the value of the unknown resistor if there is a 1 volt drop across the bridge?

• 2.54 ohms

• 3.54 ohms

• 5.54 ohms

• 4.54 ohms

What is the value of the unknown resistor if there is a 1 volt increase across the bridge?

• 10.4 ohms

• 12.4 ohms

• 13.4 ohms

• 11.4 ohms

What method is used to solve for the unknown resistor in a Wheatstone Bridge?

• Kirchhoff's Law

• Ohm's Law

• Coulomb's Law

• Faraday's Law