Characteristics of alternating currents — Physics 9702 AS & A Level Question & Worked Solution

(a)[2]

State two advantages of sending data in digital form rather than analogue form.

(b(i))[2]

Outline how the ADC changes the analogue signal $S_i$ into the digital signal $D$.

(b(ii)-1)[1]

The ADC and the DAC use the same sampling rate and the same number of bits in each digital number. State the effect on the transmitted analogue signal $S_T$ when the sampling rate is raised.

(b(ii)-2)[1]

The ADC and the DAC use the same sampling rate and the same number of bits in each digital number. State the effect on the transmitted analogue signal $S_T$ when the number of bits in each digital number is raised.

(b(ii).1)[1]

The ADC and the DAC use the same sampling rate and the same number of bits in each digital number. State the effect on the transmitted analogue signal $S_T$ when the sampling rate is increased.

(b(ii).2)[1]

The ADC and the DAC use the same sampling rate and the same number of bits in each digital number. State the effect on the transmitted analogue signal $S_T$ when the number of bits in each digital number is raised.

Characteristics of alternating currents — practice question

Worked solution & mark scheme