An electric field of 1500, V/m and a magnetic | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) When an electron moves through both electric and magnetic fields,the net Lorentz force acting on it is given by $\vec{F} = q(\vec{E} + \vec{v} 	i

Vedclass · Accepted Answer

$3.75 	imes 10^{3} \,m/s$

Vedclass · Answer

(C) When an electron moves through both electric and magnetic fields,the net Lorentz force acting on it is given by $\vec{F} = q(\vec{E} + \vec{v} 	imes \vec{B})$.For the electron to move in a straight line at a uniform speed,the net force must be zero.This implies that the electric force must be balanced by the magnetic force: $qE = qvB$.Therefore,the speed $v$ is given by $v = \frac{E}{B}$.Given $E = 1500\, V/m$ and $B = 0.40\, Wb/m^2$,we calculate:$v = \frac{1500}{0.40} = 3750\, m/s$.This can be written in scientific notation as $v = 3.75 	imes 10^{3} \,m/s$.

An electric field of $1500\, V/m$ and a magnetic field of $0.40\, Wb/m^2$ act on a moving electron. The minimum uniform speed along a straight line the electron could have is:

Similar Questions

Which one of the following orders is correct for the first ionisation energies of the elements?

$A$ rocket of mass $M$ is launched vertically from the surface of the earth with an initial speed $V$. Assuming the radius of the earth to be $R$ and negligible air resistance,the maximum height attained by the rocket above the surface of the earth is

Vexillary aestivation is a characteristic feature of the family .........

The angle between the lines $\vec{r}=(2 \hat{i}-3 \hat{j}+\hat{k})+\lambda(\hat{i}+4 \hat{j}+3 \hat{k})$ and $\vec{r}=(\hat{i}-\hat{j}+2 \hat{k})+\mu(\hat{i}+2 \hat{j}-3 \hat{k})$ is

$A$ thermally insulated vessel contains an ideal gas of molecular mass $M$ and ratio of specific heats $\gamma$. It is moving with speed $v$ and is suddenly brought to rest. Assuming no heat is lost to the surroundings,its temperature increases by:

Vedclass Test Series

Exam Paper Generator

Online Exam Module