Practice portal › GUJCET › Current Electricity

Electric Current and Drift Velocity for GUJCET: 18 solved questions

Real GUJCET paper questions on electric current and drift velocity, part of current electricity. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2008 to 2025. No sign-in needed to read them.

What this topic asks

• Drift velocity, mobility and current density — 11 questions
• Current and charge flow — 7 questions

All 18 questions with solutions

• The cross-sectional area of a copper wire is equal to the area of a square of side 2 mm. If this copper wire… GUJCET 2008
• In a hydrogen atom, the electron moves around the nucleus in a circular orbit of radius 5×10⁻¹¹ m. Its time p… GUJCET 2009
• In an X-ray tube the potential difference between the anode and the cathode is 20 kV and the current flowing… GUJCET 2019
• As shown in the figure, a current of 2 A passes through a conducting wire. The radius of the cross-section of… GUJCET 2021
• The number density of free electrons in a copper conductor is estimated as 8.5×10²⁸ m⁻³. How long does an ele… GUJCET 2022
• The SI units of the current density is . GUJCET 2024
• The magnitude of the drift velocity per unit electric field is known as . GUJCET 2024
• The drift velocity of an electron is v_d in a conductor of area of cross-section A and carries a current I. N… GUJCET 2025
• In a hydrogen atom, the electron is moving in a circular orbit of radius 5.0×10⁻¹¹ m with a constant speed of… GSEB Board July 2018
• A ring of radius R and linear charge density λ on its surface is performing rotational motion about an axis p… GSEB Board March 2020 (old course)
• Which of the following physical quantities has the unit m² V⁻¹ s⁻¹? GSEB Board March 2022
• A steady current flows in a metallic conductor of non-uniform cross-section. Which of the following quantitie… GSEB Board March 2022
• The mobility of an electron moving in the electric field ⃗E with the drift velocity ⃗v_d is μ= GSEB Board July 2022
• In a hydrogen atom the electron is moving in a circular orbit of radius 5.3×10⁻¹¹ m with a constant speed of… RS Academy GUJCET booklet
• A ring of radius R and linear charge density λ on its surface is performing rotational motion about an axis p… RS Academy GUJCET booklet
• The cross-sectional area of the plane shown in the figure is equal to 1 cm². A current of 2 A flows through t… RS Academy GUJCET booklet
• A wire has a non-uniform cross-section as shown in the figure. A steady current is flowing through it. Then t… RS Academy GUJCET booklet
• What will be the time taken by an electron to move with drift velocity from one end to the other end of a cop… RS Academy GUJCET booklet