As the conductor carries a current I, it gets heated and the resistance increase
ID: 1620301 • Letter: A
Question
As the conductor carries a current I, it gets heated and the resistance increases, thus the current I will: A. Increase B. Decrease C. Remain constant D. None of the above Charge has the following property/properties: A. It is conserved B. It is C. Proton charge is D. All of the above Compared to gravitational force the electric force is: A. Smeller B. Same C. larger D. none of the above Diff velocity depends on: A. Current B. # OP charge carries C. Cross over D. all of the above Electric field lines have the following characteristics: A. Begin on positive and end on negative charges B. No two field lines can less other C. The electric is tangent to the field line D. All of the above The potential difference divided by the current gives the following units: A. amperes B. Volts C. Ohms D. no unitsExplanation / Answer
1. As conductor is being heated, and due to this temperature change, resistance increases. From ohm's law, V = IR and R = V/I. It means when resistance increases, current decreases. option (B).
2. Electric charge is also a physical property. It is conserved like mass and may carry negative (electron) and positive (proton) charge. option (D) is correct.
3. Electric force is much larger than gravitational force. You can see it for yourself. On a dry day, just run a dry comb through hair and try to lift a piece of paper with the help of charged comb. It will attract and lift the piece of paper by working against the gravity of earth. option (C).
4. Drift velocity is given by V = I / neA. where I - current, n = no. of charge carriers, A - area of cross section. option (D) is correct.
5. option (D). electric field lines have all these properties.
6. We know V/I = R from ohm's law. therefore, we will get ohms which is unit for resistance. option (C) is correct
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.