Potential Difference and Electromotive Force Lowersixth Science Physics

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Quick true/false on emf, ammeters/voltmeters, power and kWh.

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Potential Difference and Electromotive Force Lowersixth Science Physics


Potential Difference and Electromotive Force Lowersixth Science PhysicsVersión en línea Quick true/false on emf, ammeters/voltmeters, power and kWh. por YAKILI LMS 1 The energy consumed by a device in 1 hour at 1 kW is 0.5 kWh. Yes No 2 A voltmeter is connected in series with the component it measures. Yes No 3 P = I^2 R is not a real formula. Yes No 4 Electrical energy E = P × t. Yes No 5 A circuit with no energy transfer has nonzero power. Yes No 6 The ammeter has low resistance to minimize voltage drop in series. Yes No 7 A voltmeter can measure current. Yes No 8 The watt-hour is the same as the kilowatt-hour. Yes No 9 1 kWh = 3.6 × 10^6 joules. Yes No 10 The emf of a battery is the maximum potential difference when no current flows. Yes No 11 The unit of energy is joule. Yes No 12 Power rating in watts equals joules per second. Yes No 13 1 kWh equals 1,000 joules. Yes No 14 Internal resistance reduces the terminal voltage under load. Yes No 15 A voltmeter is connected in parallel with the component it measures. Yes No 16 A real wire with zero resistance would cause infinite current from any voltage. Yes No 17 The emf is always greater than the terminal voltage in a battery under no load. Yes No 18 Energy in joules equals power in watts times time in seconds. Yes No 19 The unit of emf is the ampere. Yes No 20 A wattmeter measures electrical power. Yes No 21 The kilowatt-hour is smaller than the joule. Yes No 22 An ammeter is connected in series with the circuit. Yes No 23 The ammeter has high resistance. Yes No 24 In a circuit with a 5V supply and a 2Ω resistor, current is 3 A. Yes No 25 The kilowatt-hour is not a unit of power but energy. Yes No 26 The kilowatt-hour is a unit of power. Yes No 27 In parallel circuits, voltage across components is the same. Yes No 28 In series circuits, current changes as it passes through components. Yes No 29 The resistance of a perfect conductor is infinite. Yes No 30 A circuit with a 12 V supply and a 3 Ω resistor has current 4 A. Yes No 31 The unit of emf is the volt. Yes No 32 The kilowatt-hour is a unit of time. Yes No 33 The emf of a battery is always equal to its terminal voltage under load. Yes No 34 A watt is a unit of energy. Yes No 35 The unit of energy is volt. Yes No 36 Electrical energy is measured in volts. Yes No 37 A voltmeter should have very high resistance to minimize current draw. Yes No 38 EMF stands for electromotive force. Yes No 39 An ideal voltmeter has zero resistance. Yes No 40 Internal resistance of sources increases current when connected. Yes No 41 In series circuits, current is the same through all components. Yes No 42 A device labeled 'kWh' indicates energy consumption over time. Yes No 43 Ohm's law says V = R / I. Yes No 44 P = IV is derived from definitions of power and current. Yes No 45 Electrical power P = V × I. Yes No 46 The voltage across a resistor in a parallel circuit is different for each branch. Yes No 47 The kilowatt-hour is a unit of energy equal to one kilowatt used for one hour. Yes No 48 A voltmeter should be connected in series to measure voltage. Yes No 49 An ammeter is connected in series to measure the current in a circuit. Yes No 50 The emf of a cell is the maximum potential difference it can supply when no current flows. Yes No

Potential Difference and Electromotive Force Lowersixth Science Physics

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OPEN UP 5 UNIT 3: THERE IS/ARE, THERE WAS, THERE WERE

Potential Difference and Electromotive Force Lowersixth Science PhysicsVersión en línea

por YAKILI LMS

The energy consumed by a device in 1 hour at 1 kW is 0.5 kWh.

A voltmeter is connected in series with the component it measures.

P = I^2 R is not a real formula.

Electrical energy E = P × t.

A circuit with no energy transfer has nonzero power.

The ammeter has low resistance to minimize voltage drop in series.

A voltmeter can measure current.

The watt-hour is the same as the kilowatt-hour.

1 kWh = 3.6 × 10^6 joules.

The emf of a battery is the maximum potential difference when no current flows.

The unit of energy is joule.

Power rating in watts equals joules per second.

1 kWh equals 1,000 joules.

Internal resistance reduces the terminal voltage under load.

A voltmeter is connected in parallel with the component it measures.

A real wire with zero resistance would cause infinite current from any voltage.

The emf is always greater than the terminal voltage in a battery under no load.

Energy in joules equals power in watts times time in seconds.

The unit of emf is the ampere.

A wattmeter measures electrical power.

The kilowatt-hour is smaller than the joule.

An ammeter is connected in series with the circuit.

The ammeter has high resistance.

In a circuit with a 5V supply and a 2Ω resistor, current is 3 A.

The kilowatt-hour is not a unit of power but energy.

The kilowatt-hour is a unit of power.

In parallel circuits, voltage across components is the same.

In series circuits, current changes as it passes through components.

The resistance of a perfect conductor is infinite.

A circuit with a 12 V supply and a 3 Ω resistor has current 4 A.

The unit of emf is the volt.

The kilowatt-hour is a unit of time.

The emf of a battery is always equal to its terminal voltage under load.

A watt is a unit of energy.

The unit of energy is volt.

Electrical energy is measured in volts.

A voltmeter should have very high resistance to minimize current draw.

EMF stands for electromotive force.

An ideal voltmeter has zero resistance.

Internal resistance of sources increases current when connected.

In series circuits, current is the same through all components.

A device labeled 'kWh' indicates energy consumption over time.

Ohm's law says V = R / I.

P = IV is derived from definitions of power and current.

Electrical power P = V × I.

The voltage across a resistor in a parallel circuit is different for each branch.

The kilowatt-hour is a unit of energy equal to one kilowatt used for one hour.

A voltmeter should be connected in series to measure voltage.

An ammeter is connected in series to measure the current in a circuit.

The emf of a cell is the maximum potential difference it can supply when no current flows.