Parallel Circuits

D. 12 ohms and 24 ohms

What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other? A. 2.7 ohms and 5.3 ohms B. 8 ohms and 16 ohms C. 10 ohms and 20 ohms D. 12 ohms and 24 ohms

A. It increases.

What happens to total resistance in a circuit with parallel resistors if one of them opens? A. It increases. B. It halves. C. It remains the same. D. It decreases.

A. 1.5 k

What is RT for a 12 k, a 4 k, and a 3 k resistor in parallel? A. 1.5 k B. 2 k C. 6.3 k D. 19 k

A. 133 k

What is RT for fifteen 2 M resistors all connected in parallel? A. 133 k B. 300 k C. 750 k D. 30 M

B. 146.7

What is the product-over-sum result of 150 and 6800? A. 150 B. 146.7 C. 0.006 D. 6800

C. 6 mW

What is the total power loss if 2 k and 1 k parallel-connected resistors have an IT of 3 mA? A. 6 W B. 36 W C. 6 mW D. 36 mW

B. 250 ohms

What is the total resistance of four 1 k parallel-connected resistors? A. 200 ohms B. 250 ohms C. 400 ohms D. 4 kilohms

B. more than one current path exists

A circuit is parallel between two points if ___ between those two points. A. the voltage divides B. more than one current path exists C. all resistors are equal D. there is only one current path

D. more than one path for current flow

A parallel circuit differs from a series circuit in that a parallel circuit has A. no path for current flow B. fewer paths for current flow C. one path for current flow D. more than one path for current flow

D. current

A parallel circuit is also used as a divider for: A. conductance B. voltage C. power D. current

A. branch current

A parallel resistor's value that changes with age will cause a corresponding change in ______ . A. branch current B. branch voltage C. both branch current and branch voltage D. power supply voltage

C. series, series

An ammeter is connected in ______ with the branch resistor to measure branch current, and in ______ with the voltage supply to measure total parallel circuit current. A. parallel, series B. series, parallel C. series, series D. parallel, parallel

C. resistance

An open resistor in parallel will cause the total ___ to increase. A. voltage B. current C. resistance D. power

C. decrease

As additional resistors are connected to a parallel circuit, the total resistance will ___. A. increase B. increase by the value of the resistor being connected C. decrease D. remain unchanged

A. least current

Circuit analysis should reveal that the largest resistance in a parallel circuit has the ______. A. least current B. most current C. least voltage D. most voltage

A. branches

Components that connect in parallel form: A. branches B. open circuits C. short circuits D. a voltage divider

C. 3 A

Figure: Chanel 1 stereo amplifier connected sa dalawang stereo na may 8 ohms parehas In the given circuit, Channel 1 of the stereo amplifier outputs 12 V to the speakers. How much total current is the amplifier providing to the speakers? A. 0 A B. 1.5 A C. 3 A D. More information is needed to find the total current provided to the speakers

B. 300 mA

If 550 mA of current leaves a node that had 250 mA entering from one branch, how much current would enter from the other? A. 250 mA B. 300 mA C. 550 mA D. 800 mA

B. 6 mA

If a 1 k and a 2 k resistor are parallel-connected across a 12 V supply, how much current is received by the 2 k resistor? A. 4 mA B. 6 mA C. 8 mA D. 12 mA

C. 16 watts

If two parallel-connected resistors dissipate 6 watts and 10 watts of power, then what is the total power loss? A. 3.75 watts B. 4 watts C. 16 watts D. 60 watts

A. there is more than one current path between two points

In a parallel resistive circuit: A. there is more than one current path between two points B. the voltage applied divides between the branches C. the total branch power exceeds the source power D. the total circuit conductance is less than the smallest branch conductance

C. 36 W

In the given circuit, Channel 1 of the stereo amplifier outputs 12 V to the speakers. How much total power is the amplifier delivering to the speakers? A. 0 W B. 18 W C. 36 W D. More information is needed to find the total power delivered to the speakers.

D. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction

Kirchhoff's current law for parallel circuits states that the: A. sum of all branch voltages equals zero B. total circuit resistance is less than the smallest branch resistor C. sum of currents into a junction is equal to the difference of all the branch currents D. sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction

C. is equally applied to all branch conductances

The voltage across any branch of a parallel circuit: A. varies as the total current varies B. is inversely proportional to total circuit resistance C. is equally applied to all branch conductances D. is dropped in proportion to each branch resistance

C. Start with the highest scale and adjust down to a lower scale.

What procedure should be followed when troubleshooting with an ammeter or voltmeter? A. Short the leads and adjust. B. Check the meter's external power supply. C. Start with the highest scale and adjust down to a lower scale. D. Start with the lowest scale and adjust up to a higher scale.

B. R2 is open.

What would these meter readings indicate about the circuit in the given circuit? Meter Readings: I = 7.6 mA, V = 12 V A. R1 is open. B. R2 is open. C. The fuse is open. D. The circuit is operating normally.

C. 24 mW

When a parallel 5 k resistor and a 25 k resistor have a 10 V supply, what is the total power loss? A. 2.4 mW B. 3.3 mW C. 24 mW D. 33 mW

A. The smallest resistance

When parallel resistors are of three different values, which has the greatest power loss? A. The smallest resistance B. The largest resistance C. They have the same power loss. D. Voltage and resistance values are needed.

D. an ammeter or an ohmmeter

Which are the better test devices used to isolate a suspected open component within a parallel circuit? A. a voltmeter or an ohmmeter B. neither an ammeter nor a voltmeter C. a wattmeter or a voltmeter D. an ammeter or an ohmmeter

A. Voltage

Which is considered to be the common reference for a parallel circuit? A. Voltage B. Current C. Power D. Resistance