A potential difference is applied across a copper wire of radius 0.5 mm. It results in a…
Physics · JEE Advanced · NTA Exams — Current Electricity
A potential difference is applied across a copper wire of radius 0.5 mm. It results in a uniform electric field of 1.5 V/m along the length of the wire. Consequently there is a current in the wire. Temperature of the wire is 60oC.Assuming each copper atom contributes one free electron .Given that density of copper is 8.9 gm/cm3 and resistivity of copper at 20oC is 1.7×10–8 ohm.m and its temperature coefficient of resistivity at 20oC is 3.9×10–3/OC . Atomic mass of copper is 63.5 . Answer the following questions.
Drift speed of the electron is
- 2.3 × 10–2 m/s
- 4.5 × 10–3 m/s
- 7.5 × 103 m/s
- 5.7 × 103 m/s
Answer
(D) 5.7 × 10 3 m/s
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the…
- A Galvanometer is an instrument that can be used to construct an ammeter for measuring current .It can be…
- In the circuit shown in figure the current through
- In the given circuit, with steady current, the potential drop across the capacitor must be
- In the circuit, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal…
- Given below are two statements. Statement-1 : The resistivity of a semiconductor increases with increase of…
- Statement– 1 : In the circuit shown assume both cell are ideal and of fixed e.m.f., the resistor R 1 is…
- In the circuit shown the resistances are given in ohms and the battery is assumed to be ideal with e.m.f…
More Current Electricity questions · Browse all practice questions