Question

16 microcoulombs flow through a circuit in 5nanoseconds. What current flows in the circuit? ? 3.2A ? 320A 3.2microamps ? 3200A Calculate the drift velocity of the electrons in a wire of 0.5mm diameter, which has an electron concentration of $9 \times 10^{28}$ per cubic metre and is carrying a current of 2 A. $1.96 \times 10^{-7} m^2$ $1.13 \times 10^{-22} m/s$ 0.707mm/s ? 7.07m/s What is the resistivity of a 50 cm steel wire which has a resistance of 20hms and radius of 0.6 mm. $1.13 \times 10^{-6} Ohm$ metres $4.52 \times 10^{-6}$ Ohm metres $2.82 \times 10^{-7}$ Ohm metres 2.82 Ohm metres A 12V battery causes 7mA of current to flow through a circuit element. What is the resistance of the element? ? 1.714Ohms 1.714 Kilo-ohms ? 0.58Ohms $5.83 \times 10^{-4}$ Ohms What current will a 24V battery cause to flow through a 300 micro-ohm resistor? ? 7.2kA ? 80kA ? 0.8MA ? 12.5A

          16 microcoulombs flow through a circuit in 5nanoseconds. What current flows in the circuit?
? 3.2A
? 320A
3.2microamps
? 3200A
Calculate the drift velocity of the electrons in a wire of 0.5mm diameter, which has an electron
concentration of $9 \times 10^{28}$ per cubic metre and is carrying a current of 2 A.
$1.96 \times 10^{-7} m^2$
$1.13 \times 10^{-22} m/s$
0.707mm/s
? 7.07m/s
What is the resistivity of a 50 cm steel wire which has a resistance of 20hms and radius of 0.6
mm.
$1.13 \times 10^{-6} Ohm$ metres
$4.52 \times 10^{-6}$ Ohm metres
$2.82 \times 10^{-7}$ Ohm metres
2.82 Ohm metres
A 12V battery causes 7mA of current to flow through a circuit element. What is the resistance
of the element?
? 1.714Ohms
1.714 Kilo-ohms
? 0.58Ohms
$5.83 \times 10^{-4}$ Ohms
What current will a 24V battery cause to flow through a 300 micro-ohm resistor?
? 7.2kA
? 80kA
? 0.8MA
? 12.5A

16 microcoulombs flow through a circuit in 5nanoseconds. What current flows in the circuit?
? 3.2A
? 320A
3.2microamps
? 3200A
Calculate the drift velocity of the electrons in a wire of 0.5mm diameter, which has an electron
concentration of 9 × 10^28 per cubic metre and is carrying a current of 2 A.
1.96 × 10^-7 m^2
1.13 × 10^-22 m/s
0.707mm/s
? 7.07m/s
What is the resistivity of a 50 cm steel wire which has a resistance of 20hms and radius of 0.6
mm.
1.13 × 10^-6 Ohm metres
4.52 × 10^-6 Ohm metres
2.82 × 10^-7 Ohm metres
2.82 Ohm metres
A 12V battery causes 7mA of current to flow through a circuit element. What is the resistance
of the element?
? 1.714Ohms
1.714 Kilo-ohms
? 0.58Ohms
5.83 × 10^-4 Ohms
What current will a 24V battery cause to flow through a 300 micro-ohm resistor?
? 7.2kA
? 80kA
? 0.8MA
? 12.5A

Added by Albert L.

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