A charge of 12C passes through a wire in 600 seconds. Calculate the current that flows through the wire.

A charge of 12C passes through a wire in 600 seconds. Calculate the current that flows through the wire.

Input the correct answer in mA.

\(I=\Delta Q/{\Delta t}=12/600 = 20\space mA\)

There is a current of 8A in a wire. What charge passes through this wire in 40 seconds?

Select the correct answer.

\(\Delta Q = I\Delta t=8\times40=320\space C\)

There is a current in a wire. The plot below shows the charge that has passed over time. Calculate the current flowing through the wire.

Input the correct answer in A.

The plot below shows the time dependence of a current in a wire. What charge passes through the wire in 4 seconds?

Input the correct answer in C.

. Charge can be found as an area under the line: \(\Delta Q = {12\times 4\over{2}}=24\space C\).

Select a circuit in which voltmeter is connected correctly to measure the voltage of the lamp.

Select the correct answer.

To measure the voltage of the lamp correctly, voltmeter has to be connected parallel to the lamp.

Choose a circuit where ammeter is connected correctly to measure the current across the lamp.

Select the correct option.

Ammeter must be connected in series with the lamp.

Select the range of temperatures at which the phenomenon of superconductivity is typically observed in certain metals and alloys.

Select the correct option.

Calculate the resistance of a silver wire with a length of 4m and with a cross-sectional area of \(2 \space mm^2\). The resistivity of silver is known (at T=300K) and equals \(0.016 \space {Ohm\times mm^2\over m}\).

Input the correct answer in mOhms.

At which operating temperatures is Ohm's law valid for resistors?

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A circuit is shown on a picture below. Calculate the power dissipation on the lamp.

Input the correct answer in W.