Connection of Resistors and Cells in a DC Circuit Lowersixth Science Physics

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Connection of Resistors and Cells in a DC Circuit Lowersixth Science Physics


Froggy Jumps Connection of Resistors and Cells in a DC Circuit Lowersixth Science PhysicsVersión en línea Series/parallel resistors and potential dividers por YAKILI LMS 1 In series, how does total resistance compare to individual resistances? a It is the smallest resistor b It is the reciprocal sum c It is the sum of all resistances 2 In a parallel circuit, the total resistance is: a Less than the smallest individual resistance b Greater than the largest resistor c Equal to the largest resistor 3 What happens to total resistance when a resistor is added in series? a Total resistance increases b Total resistance decreases c Total resistance stays the same 4 What happens to current in a series circuit when resistance increases? a Current decreases b Current increases c Current stays the same 5 In parallel, what happens to total current when one branch is removed? a Total current decreases b Total current stays the same c Total current increases 6 Voltage across resistors in a series circuit with a fixed supply is: a Shared and can be unequal b Equal across all resistors c Zero for others 7 Voltage across resistors in a parallel circuit is: a Equal to the supply voltage b Zero c Sum of voltages 8 How is equivalent resistance of two equal resistors in parallel? a R^2/(2R) b R/2 c 2R 9 If R1 and R2 are in series, equivalent resistance is: a R1 - R2 b R1 / R2 c R1 + R2 10 If R1 and R2 are in parallel, equivalent resistance is: a R1 + R2 b 1/(1/R1 + 1/R2) c R1 * R2 11 A potential divider consists of: a Two resistors in series b One resistor c A coil and capacitor 12 The output voltage of a potential divider depends on: a The color of wires b The ratio of the two resistors c The supply frequency 13 Increasing the bottom resistor in a potential divider will: a Not affect output b Decrease the output voltage c Increase the output voltage 14 A load connected to a potential divider is: a Not connected b In series with the top resistor c In parallel with the bottom resistor 15 What is the effect of adding a load to a divider on output voltage? a Output voltage drops b Output voltage rises c Output voltage unchanged 16 Series resistors share the supply voltage in proportion to: a Physical size b Their resistances c Wattage 17 Parallel resistors share current in proportion to: a Resistor color bands b Physical length c Resistance values 18 Total current in a series circuit equals: a Sum of currents b Zero c Individual branch currents are the same 19 Total current in a parallel circuit equals: a Largest branch current b Smallest branch current c Sum of branch currents 20 What is the unit of resistance? a Ohm b Siemens c Volt 21 Which component drops more voltage in a series chain if its resistance is higher? a None of them b The higher resistor c The lower resistor 22 If a 12 V source powers two equal resistors in parallel, each resistor gets: a 12 V b 3 V c 6 V 23 If R1 = 4 Ω and R2 = 6 Ω in series, total R = a 2 Ω b 10 Ω c 24 Ω 24 If R1 = 4 Ω and R2 = 6 Ω in parallel, Req = a 1 Ω b 10 Ω c 2.4 Ω 25 Power dissipated by a resistor is P = V^2/R. Doubling R with same V causes: a Power doubles b Power to decrease by factor 4 c Power stays same 26 Replacing two resistors in series with one resistor results in: a Higher resistance b Lower resistance c Same total resistance 27 Replacing two resistors in parallel with one resistor results in: a Same total resistance b Higher resistance c Lower resistance 28 In a divider feeding a high impedance meter, output voltage: a Approximates the ideal divider ratio b Is always zero c Is unpredictable 29 Which equation is for parallel resistance of two unequal resistors? a 1/Req = 1/R1 + 1/R2 b Req = R1 + R2 c Req = R1 - R2 30 Which arrangement gives the smallest possible total resistance? a One resistor only b All resistors in parallel c All in series 31 If one branch in parallel opens, total resistance: a Drops to zero b Stays the same c Increases toward the largest branch 32 The current through a series string is: a The same in every resistor b Zero in all c Different in each 33 The current through parallel branches: a Flows identically through all b All goes through the top branch c Splits according to branch resistance 34 The symbol Ohm is used to denote: a Electrical power b Electrical resistance c Electrical current 35 Potential divider is sometimes called: a Current divider b Power divider c Voltage divider 36 A voltmeter placed across the divider's output draws: a Huge current b A small current c No current 37 If you need a stable voltage with varying load, you should: a Use a regulator instead of a simple divider b Increase resistor size c Make a larger divider 38 What happens to current in a series circuit if one resistor opens? a All current stops b Other branches compensate c Current doubles 39 Which is true about resistors in series with the same current? a Voltage is equal across all b Voltage divides in proportion to resistance c Voltage is zero on all 40 Which statement about a resistor in parallel with another? a Its voltage is the same as the source b It has twice the voltage c It has the same current 41 What is the effect of a very high load resistance on divider output? a Output becomes zero b Output becomes undefined c Output approaches top-to-bottom ratio 42 Two equal resistors in parallel give: a Double the resistor b Triple the resistor c Half of one resistor 43 The unit for electrical resistance is: a Ohm b Volt c Watt 44 Current through a single resistor in a parallel network is: a Different for each branch depending on resistance b Same as others c Always maximum 45 If you double all resistors in series, total resistance: a Halves b Remains the same c Doubles 46 What does a potential divider primarily control? a Current b Power c Output voltage 47 In a divider, increasing bottom resistance while keeping top constant: a Decreases output voltage b Increases output voltage c No change 48 What is true about power in series vs parallel? a Power only in series b Power adds in both configurations c Power only in parallel 49 Which device is used to measure potential without drawing current? a Wattmeter b Ammeter c Voltmeter 50 Which configuration yields higher current for the same supply? a Single resistor only b All parallel (low Req) c All series (high Req)

Connection of Resistors and Cells in a DC Circuit Lowersixth Science Physics

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Connection of Resistors and Cells in a DC Circuit Lowersixth Science PhysicsVersión en línea

por YAKILI LMS

In series, how does total resistance compare to individual resistances?

In a parallel circuit, the total resistance is:

What happens to total resistance when a resistor is added in series?

What happens to current in a series circuit when resistance increases?

In parallel, what happens to total current when one branch is removed?

Voltage across resistors in a series circuit with a fixed supply is:

Voltage across resistors in a parallel circuit is:

How is equivalent resistance of two equal resistors in parallel?

If R1 and R2 are in series, equivalent resistance is:

If R1 and R2 are in parallel, equivalent resistance is:

A potential divider consists of:

The output voltage of a potential divider depends on:

Increasing the bottom resistor in a potential divider will:

A load connected to a potential divider is:

What is the effect of adding a load to a divider on output voltage?

Series resistors share the supply voltage in proportion to:

Parallel resistors share current in proportion to:

Total current in a series circuit equals:

Total current in a parallel circuit equals:

What is the unit of resistance?

Which component drops more voltage in a series chain if its resistance is higher?

If a 12 V source powers two equal resistors in parallel, each resistor gets:

If R1 = 4 Ω and R2 = 6 Ω in series, total R =

If R1 = 4 Ω and R2 = 6 Ω in parallel, Req =

Power dissipated by a resistor is P = V^2/R. Doubling R with same V causes:

Replacing two resistors in series with one resistor results in:

Replacing two resistors in parallel with one resistor results in:

In a divider feeding a high impedance meter, output voltage:

Which equation is for parallel resistance of two unequal resistors?

Which arrangement gives the smallest possible total resistance?

If one branch in parallel opens, total resistance:

The current through a series string is:

The current through parallel branches:

The symbol Ohm is used to denote:

Potential divider is sometimes called:

A voltmeter placed across the divider's output draws:

If you need a stable voltage with varying load, you should:

What happens to current in a series circuit if one resistor opens?

Which is true about resistors in series with the same current?

Which statement about a resistor in parallel with another?

What is the effect of a very high load resistance on divider output?

Two equal resistors in parallel give:

The unit for electrical resistance is:

Current through a single resistor in a parallel network is:

If you double all resistors in series, total resistance:

What does a potential divider primarily control?

In a divider, increasing bottom resistance while keeping top constant:

What is true about power in series vs parallel?

Which device is used to measure potential without drawing current?

Which configuration yields higher current for the same supply?