A typical Cathode Ray Oscilloscope (CRO) is fundamentally designed to visually display and analyze which physical quantity with respect to time? MCQ with Answer and Explanation
A typical Cathode Ray Oscilloscope (CRO) is fundamentally designed to visually display and analyze which physical quantity with respect to time?
A. Pressure
B. Temperature
C. Voltage
D. Magnetic Field
Answer: Option C
Solution (By JKSSB Mock Tests)
A CRO uses an electron beam sweeping across a phosphorescent screen to create a visible graph. It is fundamentally a voltage-measuring instrument. The vertical deflection is directly proportional to the applied voltage, and the horizontal deflection is controlled by a time-base generator, allowing it to display voltage waveforms over time.
Explanation:
Charge of electron e = 1.6 × 10⁻¹⁹ C. Number n = 1/e = 1/(1.6×10⁻¹⁹) = 6.25 × 10¹⁸. This is a huge number. Important for current (1 A = 1 C/s).
Explanation:
Conservative forces (gravity, spring, electrostatic) have path-independent work; work done over any closed loop is zero. This defines conservative forces and enables potential energy definition. Non-conservative forces (friction) have non-zero closed-path work. Memory aid: 'Conservative force: ∮F·dr = 0; enables energy conservation'. This mechanics concept is frequently tested in competitive exams. Always link conservative forces to potential energy and mechanical energy conservation; this is foundational for advanced physics problem-solving.
No comments yet. Be the first to start the discussion!