10th Physics Chapter 7: Introductory Electronics

Sr #	Questions	A	B	C	D
1	In a cathode ray tube, how are electrons deflected by a magnetic field?	They move perpendicular to the field lines	They move parallel to the field lines	They experience no deflection	They move in a circular path
2	What is the primary function of a cathode ray oscilloscope (CRO)?	To generate X-rays	To amplify electrical signals	To display electrical waveforms	To measure temperature
3	How does a cathode ray oscilloscope display varying voltage signals?	By moving a beam of electrons horizontally and vertically on a screen	By using fluorescent tubes	By generating sound waves	By measuring electromagnetic radiation
4	In digital electronics, what does a combination of logic gates form?	Digital circuit	Analogue circuit	Electrical switch	Mechanical relay
5	What is the output of a NOT gate if the input is HIGH?	HIGH	LOW	Depends on the gate configuration	Cannot be determined
6	What is the output of a NOR gate if either input is LOW?	HIGH	LOW	Depends on the gate configuration	Cannot be determined
7	How are electrons deflected by an electric field in a cathode ray tube?	They move perpendicular to the field lines	They move parallel to the field lines	They experience no deflection	They move in a circular path
8	What are some common uses of a cathode ray oscilloscope?	Testing electronic circuits and analyzing waveforms	Measuring temperature and pressure	Generating X-rays and gamma rays	Detecting radio waves and microwaves
9	What advantage does a cathode ray oscilloscope offer over other instruments for analyzing signals?	It can display time-varying signals in real-time	It emits less radiation than other devices	It is more compact and portable	It provides greater accuracy in measuring temperature
10	In a cathode ray tube (CRT), which component emits electrons?	Anode	Cathode	Grid	Phosphor screen
11	Which of the following is a basic logic gate?	Transistor	Capacitor	Diode	AND gate
12	What is the primary difference between analogue and digital electronics?	Analogue electronics use continuous voltage signals, while digital electronics use discrete voltage levels.	Digital electronics use mechanical components, while analogue electronics use electronic components.	Analogue electronics operate at higher frequencies than digital electronics.	Digital electronics are more prone to interference than analogue electronics.
13	What is thermionic emission?	The emission of heat energy from a heated object	The emission of electrons from a heated filament	The emission of photons from a heated material	The emission of sound waves from a heated surface
14	What is the output of an AND gate if both inputs are HIGH?	HIGH	LOW	Depends on the gate configuration	Cannot be determined
15	Which logic gate produces the inverse of its input?	AND gate	OR gate	NOT gate	NAND gate
16	What is the working principle of a cathode ray oscilloscope?	It uses the deflection of electrons by electric and magnetic fields to display signals on a screen	It uses X-rays to produce images	It uses sound waves to create visual patterns	It uses radioactive decay to generate electrical signals
17	What is the primary use of logic gates?	To amplify electrical signals	To convert analogue signals to digital signals	To perform mathematical calculations	To process and manipulate binary data
18	What is the output of an OR gate if either input is HIGH?	HIGH	LOW	Depends on the gate configuration	Cannot be determined
19	What is the output of a NAND gate if both inputs are LOW?	HIGH	LOW	Depends on the gate configuration	Cannot be determined
20	What is the function of an electron gun in a cathode ray tube?	To generate X-rays	To focus and accelerate electrons	To detect electron emissions	To amplify electrical signals