P6 FA3

If the voltage across a resistance doubles:

• the resistance doubles

• the current is halved

• the current is doubled

• the current is unchanged

Internal resistance of ideal voltage source is

• finite

• infinite

• zero

• 100 ohms

Which is a correct statement of Kirchhoff's junction law?

• The sum of voltages around any closed loop in a circuit is zero

• The total voltage entering a junction is equal to the total voltage leaving the junction

• The sum of currents around any closed loop in a circuit is zero

• The total current entering a junction is equal to the total current leaving the junction

• The total current through the resistors is the sum of the current through each resistor.

The algebraic sum of voltages around any closed path in a network is equal to ____________

• 0

• Infinity

• Negative Polarity

• 1

Which one of the following statements is true concerning capacitors of unequal capacitance connected in series?

• The equivalent capacitance of the circuit is the sum of the individual capacitances.

• The total voltage supplied by the battery is the sum of the voltages across each capacitor.

• Each capacitor holds a different amount of charge.

• The total positive charge in the circuit is the sum of the positive charges on each capacitor.

Capacitors C1 and C2 are connected in parallel and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as: 

• the product of the charges on C1 and C2

• the difference of the charges on C1 and C2

• the charge on C1

• the sum of the charges on C1 and C2

Two wires, A and B, and a variable resistor, R, are connected in series to a battery. Which one of the following results will occur if the resistance of R is increased?

• The voltage across A and B will increase.

•   The current through A and B will increase.

• The power used by the entire circuit will increase

• The current through the entire circuit will decrease.

KCL is based on the fact that

• Charge accumulation is possible at node

• There cannot be an accumulation of charge at a node.

• There is a possibility for a node to store energy.

• Charge accumulation may or may not be possible

When a light bulb is connected to a 10 V battery, a current of 0.7 A passes through the bulb filament. What is the resistance of the filament?

An ideal voltmeter V is connected to a 3 ohm resistor and a battery with emf  7 and an internal resistance 2 ohm as shown. What is the current in the 3 ohm resistor?  Numerical Answer only. Round off  to three (3) decimal places.