MCQ
Which of the following are electromagnetic waves?
- A$\alpha-\text{decay}$
- B$\beta^+-\text{decay}$
- C$\beta^--\text{decay}$
- D$\gamma-\text{decay}$
✓
Answer
- $\gamma-\text{decay}$
Explanation:
Alpha rays, beta-plus and beta-minus rays carry charged particles that show particle behaviour. On the other hand, gamma rays carry photons that show particle as well as wave behaviour. Hence, only gamma rays are electromagnetic waves.
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
A spherical drop of capacitance 1 mF is broken into eight drops of equal radius. Then, the capacitance of each small drop is ......
|
(a) |
(b) 8μF |
(c) |
(d) |
Specific rotation of sugar solution is 0.01 SI units. 200 
of impure sugar solution is taken in a polarimeter tube of length 0.25m and an optical rotation of 0.4rad is observed. The percentage of purity of sugar is the sample is
|
(a) 80% |
(b) 89% |
(c) 11% |
(d) 20% |
The relation between voltage sensitivity (
) and current sensitivity (
) of a moving coil galvanometer is (Resistance of Galvanometer = G)
|
(a) |
(b) |
(c) |
(d) |
When the intensity of a light source is increased:
A cube of a metal is given a positive charge Q. For the above system, which of the following statements is true
|
(a) Electric potential at the surface of the cube is zero |
|
(b) Electric potential within the cube is zero |
|
(c) Electric field is normal to the surface of the cube |
|
(d) Electric field varies within the cube |
When 
is bombarded with one neutron, the fission occurs and the products are three neutrons, 
and
(a) 
|
(b) 
|
(c) 
|
(d) 
|
The opposition offered by the electrolyte of the cell to the flow of current through itself is known as __________.
A vector is not changed if:
- It is rotated through an arbitrary angle.
- It is multiplied by an arbitrary scalar.
- It is cross multiplied by a unit vector.
- It is slid parallel to itself.
Which of the following statements is correct
|
(a) The current in a photocell increases with increasing frequency of light |
|
(b) The photocurrent is proportional to applied voltage |
|
(c) The photocurrent increases with increasing intensity of light |
|
(d) The stopping potential increases with increasing intensity of incident light |
Wave front means: