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**The opposite figure represents a simple circuit, from the figure is the conventional direction of the electric current inside the battery and during the resistance** [**R**]{.math.inline} **Direction of current inside the battery** **Direction of current through R** ------- --------...

**The opposite figure represents a simple circuit, from the figure is the conventional direction of the electric current inside the battery and during the resistance** [**R**]{.math.inline} **Direction of current inside the battery** **Direction of current through R** ------- --------------------------------------------- ------------------------------------ **ⓐ** **from a to b** **from a to b** **ⓑ** **from a to b** **from b to a** **ⓒ** **from b to a** **from a to b** **ⓓ** **from b to a** **from b to a** Which of the following electric circuits shows the conventional direction of current (I) and the direction of the free electrons motion ([*e*^−^]{.math.inline}) correctly? -- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ --- --- ⓐ ⓑ ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ An electric charge of 20 C passes through an electrical device in 5 s. The current flowing through the device is \...\...\..... -- --------------------------------------------------------------------------------------------------------------------------------- -------------------------- --- ----------------------------- --- ---------------------------- --- --------------------------- ⓐ \ ⓑ \ ⓒ \ ⓓ \ [4 *A*]{.math.display}\ [0.25 *A*]{.math.display}\ [100 *A*]{.math.display}\ [4 *mA*]{.math.display}\ ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ +-------+-------+-------+-------+-------+-------+-------+-------+-------+ | | If | | | | | | | | | | the | | | | | | | | | | curre | | | | | | | | | | nt | | | | | | | | | | inten | | | | | | | | | | sity | | | | | | | | | | passi | | | | | | | | | | ng | | | | | | | | | | throu | | | | | | | | | | gh | | | | | | | | | | a | | | | | | | | | | condu | | | | | | | | | | ctor | | | | | | | | | | is 5 | | | | | | | | | | A, | | | | | | | | | | then | | | | | | | | | | the | | | | | | | | | | numbe | | | | | | | | | | r | | | | | | | | | | of | | | | | | | | | | elect | | | | | | | | | | rons | | | | | | | | | | passi | | | | | | | | | | ng | | | | | | | | | | throu | | | | | | | | | | gh | | | | | | | | | | a | | | | | | | | | | secti | | | | | | | | | | on | | | | | | | | | | of it | | | | | | | | | | in 4 | | | | | | | | | | s is | | | | | | | | | | equal | | | | | | | | | | to | | | | | | | | | | \...\ | | | | | | | | | |...\. | | | | | | | | | |..\.. | | | | | | | | | |... | | | | | | | | | | Elect | | | | | | | | | | ron. | | | | | | | | | | | | | | | | | | | | (give | | | | | | | | | | n | | | | | | | | | | that | | | | | | | | | | the | | | | | | | | | | charg | | | | | | | | | | e | | | | | | | | | | of an | | | | | | | | | | elect | | | | | | | | | | ron | | | | | | | | | | is[6  | | | | | | | | | | × 10^ | | | | | | | | | |  − 19 | | | | | | | | | | ^ | | | | | | | | | | C]{.m | | | | | | | | | | ath | | | | | | | | | |.inli | | | | | | | | | | ne}) | | | | | | | | +=======+=======+=======+=======+=======+=======+=======+=======+=======+ | | ⓐ | \ | ⓑ | \ | ⓒ | \ | ⓓ | \ | | | | [8 ×  | | [8 ×  | | [1.25 | | [1.25 | | | | 10^ − | | 10^20 | |  × 10 | |  × 10 | | | |  21^] | | ^]{.m | | ^ − 2 | | ^20^] | | | | {.mat | | ath | | 0^]{. | | {.mat | | | | h | |.disp | | math | | h | | | |.disp | | lay}\ | |.disp | |.disp | | | | lay}\ | | | | lay}\ | | lay}\ | +-------+-------+-------+-------+-------+-------+-------+-------+-------+ ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- If an electric current of intensity 5 A passes through a conductor, then the quantity of electric charges that passes through a certain cross-section of the conductor within 2 seconds equals.......... -- ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- --- ---------------------------- --- -------------------------- --- --------------------------- --- --------------------------- ⓐ \ ⓑ \ ⓒ \ ⓓ \ [2.5 *C*]{.math.display}\ [5 *C*]{.math.display}\ [10 *C*]{.math.display}\ [20 *C*]{.math.display}\ ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- If the electric current that passes in a conductor equals 0.3 A, it means that... -- ------------------------------------------------------------------------------------ --- ------------------------------------------------------------------------------------------------------ ⓐ the quantity of electric charge contained in the conductor is 0.3 C ⓑ the quantity of electric charge that passes through a cross-section of the conductor in 1 s is 0.3 C ⓒ the time interval in which a unit charge passes through a cross-section of the conductor is 0.3 s ⓓ the flow rate of electric charges through a cross-section of the conductor is 0.3 C per minute The opposite figure shows the relationship between the amount of charge passing through a section of two conductors a and b and the time t. The intensity of the current passing through conductor a is \...\...\...\...\... The intensity of the current passing through conductor b -- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- -------------- --- -------------------- -- ⓐ Greater than ⓑ Less than ⓒ evenness ⓓ can not determined -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The opposite graph represents the relationship between the amount of electric charge passing through a section of a conductor and time. The intensity of the current passing through the conductor is \...\...\...\... -- ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ----------------------------------- --- --------------------------- -- ⓐ \ ⓑ \ [5 × 10^ − 3^ A]{.math.display}\ [5 *A*]{.math.display}\ ⓒ \ ⓓ \ [10 *A*]{.math.display}\ [20 *A*]{.math.display}\ --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------