enEnglishguગુજરાતી
GUJCET · Physics · Current Electricity
The drift velocity of an electron is \(v_d\) in a conductor of area of cross-section \(A\) and carries a current I. Now, the area of cross-section and current flowing through the conductor are double, then new drift velocity of the electron is ___________ .
- A \(\frac{v_d}{2}\)
- B \(\frac{v_d}{4}\)
- C \(4 v_d\)
- D \(v_d\)
Answer & Solution
Correct Answer
(D) \(v_d\)
Step-by-step Solution
Detailed explanation
\(v_d = \frac{I}{nAe}\) \(v'_{d} = \frac{2I}{n(2A)e}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The unit of electric field intensity is _________.GUJCET 2006 Medium
- When a charged particle moves perpendicular to the uniform magnetic field then ________.GUJCET 2016 Medium
- A galvanometer acting as a voltmeter should have ___________.GUJCET 2014 Hard
- If velocity of an electron is \((2 \hat{i}+3 \hat{j}) ms ^{-1}\) and it enters in the magnetic field of \(4 \hat{k} T\), then _________.GUJCET 2007 Easy
- At certain place on the surface of the earth, horizontal component of earth's magnetic field is same as vertical component of earth magnetic field, then what will be angle of dip at that place ?GUJCET 2021 Hard
- Two parallel very long straight wires carrying current of 5 A each are kept at a separation of 1 m . If the currents are in the same direction, the force per unit length between them is _________. \(\frac{ N }{m}\). \(\left(\mu_0=4 \pi \times 10^{-7} SI \right)\)GUJCET 2018 Medium
More PYQs from GUJCET
- Predict the order of reactivity of the following compounds in \(S _{ N } 1\) reaction.
(i) \(C _6 H _5 \cdot CH _2 Br\)
(ii) \(C _6 H _5 \cdot CH \cdot\left( C _6 H _5\right) Br\)
(iii) \(C _6 H _5 \cdot CH \cdot\left( CH _3\right) Br\)
(iv) \(C _6 H _5 \cdot C \cdot\left( CH _3\right)\left( C _6 H _5\right) Br\)GUJCET 2024 Hard - How many electrons are present in 3d orbital of tetrahedral \(K _2\left[ NiCl _4\right]\) complex.GUJCET 2009 Hard
- Zona pellucida is first observed in__________.GUJCET 2022 Easy
- Using the data given below find out the strongest reducing agent ?
\(\begin{array}{ll}
E_{Cr_2 O_7^{2-} / Cr^{3+}}^0=1.33 V & E_{Cl_2 / Cl^{-}}^0=1.36 V \\
E_{MnO_4^{-}}^0 / Mn^{2+}=1.51 V & E_{Cr^{3+} / Cr}^0=-0.74 V\end{array}\)GUJCET 2021 Medium - The general solution of the differential equation \(\frac{dy}{dx} = e^{x+y}\) is ________.GUJCET 2026 Easy
- A pure inductor of \(\mathbf{2 5 . 4 8 ~ m H}\) and a pure resistor of \(8 \Omega\) are connected in series with an AC source of frequency 50 Hz . The phase difference between current (I) and voltage (V) in this circuit is ______________ .GUJCET 2023 Hard