1.1 A burn must be treated by …
A covering the burnt area with butter - NSC Electrical Technology Digital - Question 1 - 2024 - Paper 1
Question 1
1.1 A burn must be treated by …
A covering the burnt area with butter.
B putting ice on the burn wound.
C puncturing the blisters.
D running cold water over the ... show full transcript
Worked Solution & Example Answer:1.1 A burn must be treated by …
A covering the burnt area with butter - NSC Electrical Technology Digital - Question 1 - 2024 - Paper 1
Step 1
A burn must be treated by …
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: puncturing the blisters. This technique is often advised to relieve pressure and prevent infection.
Step 2
In an op-amp bistable multivibrator circuit the op amp operates as an …
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A: comparator. In a bistable multivibrator, the op-amp functions as a comparator that determines the output state.
Step 3
A/n … changes its output state when a trigger pulse is received. It remains in that state for a time determined by the RC time constant.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: monostable multivibrator. This device changes its output state temporarily based on the input trigger.
Step 4
A circuit used to change a sine wave into a square wave with the same frequency is a …
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B: Schmitt trigger. This circuit converts analog signals into digital through sharp transitions.
Step 5
When a positive square wave is applied to the inverting input of an op-amp integrator and the non-inverting input is connected to ground, the capacitor will …
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A: charge exponentially to the supply voltage. This is a fundamental behavior of integrators in op-amps.
Step 6
The 555 IC functions as a … in an astable mode operation.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: free running oscillator. The 555 timer in astable mode generates continuous square waves.
Step 7
The main characteristics of operational amplifiers are …
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is D: very high voltage gain, high input impedance, low output impedance and wide bandwidth. These are defining features for operational amplifiers.
Step 8
A … output connects the transistor collector to the LED cathode.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is D: sinking. This configuration is typical for transistor outputs in control circuitry.
Step 9
ONE method of displaying information in digital systems is through the use of a …
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B: light-emitting diode. LEDs are commonly used for indicating status or information in digital devices.
Step 10
An up/down counter is used as an application in …
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B: mine-winding gears. These counters are often used in mechanical applications like gears.
Step 11
Choose the correct JK input combinations that will produce a '1' (high) on the output of the JK flip-flop:
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is B: J = 1 and K = 0. This combination sets the output to high.
Step 12
Microcontrollers can be programmed in various ways. One of the methods to program a microcontroller is to use a flow chart. A flowchart is defined as ...
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A: block diagram with instructions in the order of execution. Flowcharts represent the logical flow of processes.
