Current Electricity II Lowersixth Science Physics

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AC/DC, RMS, and circuit symbols true/false

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Current Electricity II Lowersixth Science Physics


Current Electricity II Lowersixth Science PhysicsVersion en ligne AC/DC, RMS, and circuit symbols true/false par YAKILI LMS 1 AC current changes direction periodically. Yes No 2 A variable resistor can change the circuit current. Yes No 3 RMS stands for root mean square. Yes No 4 The RMS of current in a resistor under AC can be used to find average power. Yes No 5 The symbol for a light bulb in many diagrams is a circle with a cross or filament. Yes No 6 The RMS value of a DC current is always zero. Yes No 7 Resistance in a conductor generally increases with temperature. Yes No 8 Ohm's law relates voltage, current, and resistance as V = IR. Yes No 9 AC circuits can contain resistors, capacitors, and inductors. Yes No 10 Conductors have low electrical resistance. Yes No 11 DC voltage has a constant polarity. Yes No 12 A mixed RLC circuit can display complex impedance. Yes No 13 A sine-wave AC current has a well-defined peak, trough, and zero crossings. Yes No 14 In a parallel circuit, the voltage across each branch is the same. Yes No 15 A resistor is symbolized by a zigzag line in circuit diagrams. Yes No 16 An inductor stores energy in a magnetic field. Yes No 17 A switch can be used to open or close a circuit. Yes No 18 A fixed resistor is often used to limit current in a circuit. Yes No 19 A cell is a single electrochemical source, smaller than a battery. Yes No 20 For a sine wave, the RMS value is the peak value divided by the square root of 2. Yes No 21 An ammeter is connected in series to measure current. Yes No 22 The total resistance in series is the sum of individual resistances. Yes No 23 Power dissipated in a resistor is P = VI = I^2R = V^2/R. Yes No 24 The RMS of a DC quantity equals its constant value. Yes No 25 A inductor is symbolized by a series of curved lines in circuit diagrams. Yes No 26 A combined RC circuit contains a resistor and a capacitor. Yes No 27 In a series circuit, different components can have different currents. Yes No 28 AC voltage varies sinusoidally in many household supplies. Yes No 29 A voltmeter should be connected in series with a component to measure voltage. Yes No 30 A multimeter can measure AC and DC values for voltage and current. Yes No 31 RMS helps compare heating effects of AC and DC. Yes No 32 The total resistance in parallel is found by summing reciprocals of resistances. Yes No 33 RMS values are useful for heating effects in AC circuits. Yes No 34 Electric current can be either alternating (AC) or direct (DC). Yes No 35 In a direct current circuit, the current flows in one direction only. Yes No 36 In a parallel circuit, the current splits among branches. Yes No 37 A resistor converts electrical energy into heat. Yes No 38 RMS value is especially applicable for sinusoidal waveforms. Yes No 39 Ohm's law can be applied to circuits containing resistors in series and parallel. Yes No 40 In an AC supply, peak voltage is higher than the RMS voltage by a factor of √2. Yes No 41 A voltmeter is connected in parallel to measure potential difference. Yes No 42 A combined RL circuit contains a resistor and an inductor. Yes No 43 In a series circuit, the same current flows through all components. Yes No 44 Kirchhoff's current law states that the total current entering a junction equals the total leaving. Yes No 45 RMS value represents the effective value of an alternating quantity. Yes No 46 A fuse is a protective device that breaks the circuit when overloaded. Yes No 47 A battery symbol usually shows a long and a short line. Yes No 48 A capacitor is symbolized by two parallel lines in circuit diagrams. Yes No 49 Kirchhoff's voltage law states that the sum of potential differences around a loop is zero. Yes No 50 Insulators have very high electrical resistance. Yes No

Current Electricity II Lowersixth Science Physics

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Current Electricity II Lowersixth Science PhysicsVersion en ligne

par YAKILI LMS

AC current changes direction periodically.

A variable resistor can change the circuit current.

RMS stands for root mean square.

The RMS of current in a resistor under AC can be used to find average power.

The symbol for a light bulb in many diagrams is a circle with a cross or filament.

The RMS value of a DC current is always zero.

Resistance in a conductor generally increases with temperature.

Ohm's law relates voltage, current, and resistance as V = IR.

AC circuits can contain resistors, capacitors, and inductors.

Conductors have low electrical resistance.

DC voltage has a constant polarity.

A mixed RLC circuit can display complex impedance.

A sine-wave AC current has a well-defined peak, trough, and zero crossings.

In a parallel circuit, the voltage across each branch is the same.

A resistor is symbolized by a zigzag line in circuit diagrams.

An inductor stores energy in a magnetic field.

A switch can be used to open or close a circuit.

A fixed resistor is often used to limit current in a circuit.

A cell is a single electrochemical source, smaller than a battery.

For a sine wave, the RMS value is the peak value divided by the square root of 2.

An ammeter is connected in series to measure current.

The total resistance in series is the sum of individual resistances.

Power dissipated in a resistor is P = VI = I^2R = V^2/R.

The RMS of a DC quantity equals its constant value.

A inductor is symbolized by a series of curved lines in circuit diagrams.

A combined RC circuit contains a resistor and a capacitor.

In a series circuit, different components can have different currents.

AC voltage varies sinusoidally in many household supplies.

A voltmeter should be connected in series with a component to measure voltage.

A multimeter can measure AC and DC values for voltage and current.

RMS helps compare heating effects of AC and DC.

The total resistance in parallel is found by summing reciprocals of resistances.

RMS values are useful for heating effects in AC circuits.

Electric current can be either alternating (AC) or direct (DC).

In a direct current circuit, the current flows in one direction only.

In a parallel circuit, the current splits among branches.

A resistor converts electrical energy into heat.

RMS value is especially applicable for sinusoidal waveforms.

Ohm's law can be applied to circuits containing resistors in series and parallel.

In an AC supply, peak voltage is higher than the RMS voltage by a factor of √2.

A voltmeter is connected in parallel to measure potential difference.

A combined RL circuit contains a resistor and an inductor.

In a series circuit, the same current flows through all components.

Kirchhoff's current law states that the total current entering a junction equals the total leaving.

RMS value represents the effective value of an alternating quantity.

A fuse is a protective device that breaks the circuit when overloaded.

A battery symbol usually shows a long and a short line.

A capacitor is symbolized by two parallel lines in circuit diagrams.

Kirchhoff's voltage law states that the sum of potential differences around a loop is zero.

Insulators have very high electrical resistance.