Electrons moving with different speeds enter a uniform magnetic f… - Vidyadip

MCQ

Electrons moving with different speeds enter a uniform magnetic field in a direction perpendicular to the field. They will move along circular paths.

A
of same radius
✓
with larger radii for the faster electrons
C
with smaller radii for the faster electrons
D
either $(b)$ or $(c)$ depending on the magnitude of the magnetic field

✓

Answer

Correct option: B.

with larger radii for the faster electrons

b
$r=\frac{m v}{q B} \Rightarrow r \propto v$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 4. Moving charges and magnetism→4. Moving charges and magnetism — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

In ${88^{Ra}}^{226}$ nucleus, there are

In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a

When the key K is pressed at time t = 0, which of the following statements about the current I in the resistor AB of the given circuit is true

The switch in circuit shifts from $1$ to $2$ when $V_C > 2V/3$ and goes back to $1$ from $2$ when $V_C < V/3$ . The voltmeter reads voltage as plotted. What is the period $T$ of the wave form in terms of $R$ and $C$ ?

The reciprocal of resistance is

With increase in temperature the conductivity of:

Three capacitors $2,\, 3$ and $6\ \mu F$ are joined in series with each other. What is the minimum effective capacitance......$\mu \,F$

For what value of R the net resistance of the circuit will be 18 ohms

An electric dipole will experience a net force when it is placed in.

Force of attraction between two point charges $Q$ and $-Q$ separated by $d\,$ metre is ${F_e}$. When these charges are placed on two identical spheres of radius $R = 0.3\,d$ whose centres are $d\,$ metre apart, the force of attraction between them is