MCQ
Magnetic field does not cause deflection in:
- A$\alpha-\text{rays}$
- B$\beta^+-\text{rays}$
- C$\beta^--\text{rays}$
- D$\gamma-\text{rays}$
✓
Answer
- $\gamma-\text{rays}$
Explanation:
Magnetic force acts on a charged particle, due to which it deflects from its path. The magnitude of this force is measured as $\Big|\overrightarrow{\text{F}}\Big|=\Big|\text{q}\Big(\overrightarrow{\text{v}}\times\overrightarrow{\text{B}}\Big)\Big|.$
Here, q is the charge on the particle that is moving with speed v in a uniform magnetic field B.
Since alpha, beta-plus and beta-minus are charged particles, they suffer deflection due to the field applied. On the other hand, gamma rays are photons and due to zero charge, they do not suffer any deflection.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The antenna current of an AM transmitter is 8 A when only carrier is sent but increases to 8.96 A when the carrier is sinusoidally modulated. The percentage modulation is
|
(a) 50% |
(b) 60% |
(c) 65% |
(d) 71% |
A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be
|
(a) First clockwise then anticlockwise |
(b) In clockwise direction |
|
(c) In anticlockwise direction |
(d) First anticlockwise then clockwise |
Debye is the unit of:
Figure shows a conducting loop being pulled out of a magnetic field with a speed u. Which of the four plots shown in figure may represent the power delivered by the pulling agent as a function of the speed u?
The pressure of a gas kept in an isothermal container is 200kPa. If half the gas is removed from it, the pressure will be:
- 100kPa.
- 200kPa.
- 400kPa.
- 800kPa.
X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be:
Two spherical conductors A and B of radius a and b (b > a) are placed in air concentrically B is given charge + Q coulomb and A is grounded. The equivalent capacitance of these is
|
(a) 4π |
(b) 4 π |
(c) 4 π |
(d) 4 π |
de-Broglie hypothesis treated electrons as
|
(a) Particles |
(b) Waves |
(c) Both ‘a’ and ‘b’ |
(d) None of these |
No current flows between two charged bodies connected together when they have the same
|
(a) Capacitance or |
(b) Charge |
|
(c) Resistance |
(d) Potential or |
The phenomena involved in the reflection of radiowaves by ionosphere is similar to: