CUET · PHYSICS · PYQ PAPER 2023
Which of the following statements are correct?
(A) The resistivity of a semiconductor decreases with increasing temperature.
((B) The potentiometer is unaffected by the internal resistance of the source.
((C) In ionic crystals and electrolytic liquids electrons carry the electric current.
((D) Ohm's law fails if V depends on I non-linearly.
((E) Kirchhoff's rules are used for analysis of electric circuits.
(Choose the correct answer from the options given below :
- A (B), (C) and (E) only
- B (A), (B), (D) and (E) only
- C (C), (D) and (E) only
- D (A), (C) and (D) only
Answer & Solution
Correct Answer
(B) (A), (B), (D) and (E) only
Step-by-step Solution
Detailed explanation
(A), (B), (D), and (E) are all accurate: Semiconductors become more conductive as temperature rises, potentiometers provide precise EMF measurements without drawing current, and Kirchhoff's laws are essential for circuit analysis. B) (A), (B), (D) and (E) only.
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