$CATEGORY: Science - Khan Academy/12.Electricity/12.Electricity--Introduction

//Multiple Choice

The SI unit of charge is\: {
    ~Ampere
    =Coulomb
    ~Volt
    ~Ohm
}

One coulomb of charge is equivalent to\: {
    ~1.6×10⁻¹⁹
    ~The charge of 1 electron
    =The charge carried by 6.25×10¹⁸ electrons
    ~9.1×10⁻³¹ electrons
}

If 2 coulombs of charge flow in 4 seconds, the current is\: {
    ~2 A
    =0.5 A
    ~8 A
    ~4 A
}

The relation between charge (Q), current (I), and time (t) is\: {
    =Q\=I×t
    ~I\=Q×t
    ~t\=Q×I
    ~Q\=t/I
}

The charge of one electron is approximately\: {
    =1.6×10⁻¹⁹ C
    ~1.6×10¹⁹ C
    ~6.25×10⁻¹⁸ C
    ~6.25×10¹⁸ C
}

//True or False

The SI unit of charge is the ampere. {F}

One coulomb is the amount of charge transferred by a current of 1 ampere in 1 second. {T}

The charge of an electron is positive. {F}

If 10 coulombs of charge flow in 2 seconds, the current is 5 A. {T}

Coulomb is a derived unit. {F}

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