Back to CURRENT ELECTRICITY
NEET UG PHYSICS MCQ: CURRENT ELECTRICITY
1
Easy
1 of 1
Analyzing
+4 | -1
Statement-1: When a wire is stretched so that its diameter is halved then its resistance become 16 times.
Statement-2: Resistance of wire decrease with increase in length.
Statement-2: Resistance of wire decrease with increase in length.
View answer and explanation
Correct option: C
Statement-1 is true, Statement-2 is false
Statement-1 is true, and Statement-2 is false. When the diameter is halved, the area becomes one-fourth, and since the volume is constant, the length becomes 4 times its initial length. Therefore, the resistance becomes 16 times. Resistance increases with length.
More Questions from CURRENT ELECTRICITY
Practice All Chapter MCQs →
In the absence of applied potential, the electric current flowing through a metallic wire is zero because
A metallic block has no potential difference applied across it, then the mean velocity of free electrons at absolute temperature is
In a thermocouple, which of the following statements is not true
(A) The drift velocity of electrons decreases with the increase in the temperature of conductor.
(B) The drift velocity is inversely proportional to the area of cross-section of given conductor.
(C) The drift velocity does not depend on the applied potential difference to the conductor.
(D) The drift velocity of electron is inversely proportional to the length of the conductor.
(E) The drift velocity increases with the increase in the temperature of conductor.
Choose the correct answer from the options given below The mass of ions deposited during a given interval of time in the process of electrolysis depends on The steady current flows in a metallic conductor of non-uniform cross-section. The constant along the length of the conductor
(B) The drift velocity is inversely proportional to the area of cross-section of given conductor.
(C) The drift velocity does not depend on the applied potential difference to the conductor.
(D) The drift velocity of electron is inversely proportional to the length of the conductor.
(E) The drift velocity increases with the increase in the temperature of conductor.
Choose the correct answer from the options given below The mass of ions deposited during a given interval of time in the process of electrolysis depends on The steady current flows in a metallic conductor of non-uniform cross-section. The constant along the length of the conductor