alleryIn a metallic wire of fixed n and area A, if the current is doubled, the electron drift speed:
Ais halved
Bremains unchanged
Cbecomes four times
Ddoubles
Answer & Solution
Correct answer: D. doubles
Since I = neAv_d, with n and A fixed v_d ∝ I, so doubling the current doubles the drift speed.
Keep practising Current Electricity
Browse all Current Electricity questions for NEET UG, or explore more Physics topics.
Related questions
Current electricity numbersThe resistance inside a cell itself is called its:NEET · Physics · Kirchhoff's LawsTap what affects resistanceHalving the cross-section area of a conductor makes resistance:Resistance depends on the material and on the conductor's:The quantity denoted by sigma, the inverse of resistivity, is:Kirchhoff's junction rule for currents I1, I2 into a junction gives: