Question:
The drift speed of electrons in a conductor is estimated to be only a few mm s-1, But on closing a circuit, how current is established almost instantly in an electric circuit?
The drift speed of electrons in a conductor is estimated to be only a few mm s-1, But on closing a circuit, how current is established almost instantly in an electric circuit?
Updated On: May 18, 2024
- Electrons are accelerated towards the positive end of the conductor while their velocity increases towards the other end
- Drift velocity of electrons increases
- Electric field is established throughout the circuit with the speed of an electromagnetic wave, causing at every point local electron drift causing current.
- The electrons drift towards the negative end
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
The correct option is(C):Electric field is established throughout the circuit with the speed of an electromagnetic wave, causing at every point local electron drift causing current.
Was this answer helpful?
0
0
Top Questions on Electrostatics
- Consider the integral form of the Gauss's law in electrostatics:
\( \oint \oint \vec{E} \cdot d\vec{A} = \frac{Q}{\epsilon_0} \)
Which of the following statements are correct?- WBJEE - 2024
- Physics
- Electrostatics
- Three point charges \(q, -2q\), and \(q\) are placed along the \(x\)-axis at \(x = -a, 0,\) and \(a\), respectively. As \(a \to 0\) and \(q \to \infty\), while \(qa^2 = Q\) remains finite, the electric field at a point \(P\), at a distance \(x \gg a\) from \(x = 0\), is given by: \[\vec{E} = \frac{qQ}{4 \pi \epsilon_0 x^3} \hat{i}.\] Then, find the relationship between \(\alpha\) and \(\beta\).
- WBJEE - 2024
- Physics
- Electrostatics
- The equivalent capacitance of a combination of connected capacitors shown in the figure between the points P and N is:
- WBJEE - 2024
- Physics
- Electrostatics
- A charge \( Q \) is placed at the center of a cube of sides \( a \). The total flux of electric field through the six surfaces of the cube is:
- WBJEE - 2024
- Physics
- Electrostatics
- A thin metallic wire having a cross-sectional area of \( 10^{-4} \, \text{m}^2 \) is used to make a ring of radius 30 cm. A positive charge of \( 2\pi \, C \) is uniformly distributed over the ring, while another positive charge of 30 pC is kept at the center of the ring. The tension in the ring is ______ N; provided that the ring does not deform (neglect the influence of gravity).
(Given, \(\frac{1}{4 \pi \varepsilon_0} = 9 \times 10^9 \, \text{SI units}\))- JEE Main - 2024
- Physics
- Electrostatics
View More Questions
Questions Asked in CUET exam
- Who devised the concept of Intelligence Quotient (IQ)?
- CUET (UG) - 2024
- Psychological attributes
- As per data collected in 2011, arrange the following Indian states in terms of child sex-ratio from lowest to highest:
(A) Punjab
(B) Haryana
(C) Tamil Nadu
(D) Sikkim
Choose the correct answer from the options given below:- CUET (UG) - 2024
- Social Inequality and Exclusion
- A molecule X associates in a given solvent as per the following equation:
X ⇌ (X)n
For a given concentration of X, the van’t Hoff factor was found to be 0.80 and the
fraction of associated molecules was 0.3. The correct value of ‘n’ is:- CUET (UG) - 2024
- Solutions
- If \(A = \begin{bmatrix} 3 & 2 \\ -1 & 1 \end{bmatrix} \quad \text{and} \quad B = \begin{bmatrix} -1 & 0 \\ 2 & 5 \\ 3 & 4 \end{bmatrix},\)then \((BA)^T\) is equal to:
- CUET (UG) - 2024
- Matrices
- Two resistances of 100 \(\Omega\) and 200 \(\Omega\) are connected in series across a 20 V battery as shown in the figure below. The reading in a 200 \(\Omega\) voltmeter connected across the 200 \(\Omega\) esistance is _______.
Fill in the blank with the correct answer from the options given below- CUET (UG) - 2024
- Current electricity
View More Questions