MCQ
The best suitable metal for photoelectric effect is:
- AIron
- BSteel
- CAluminium
- DCesium
✓
Answer
- Cesium
Explanation:
Photoelectric effect occurs easily if the metal has low ionization potential cesium, the alkali metal has low ionization potential, hence it is best suitable for photoelectric effect.
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
When the length of a microscope tube increases, its magnifying power:
Dimensions of $\frac{1}{(\mu_0\in_0)}$ is:
→-
$\frac{\text{L}}{\text{T}}$
-
$\frac{\text{T}}{\text{L}}$
-
$\frac{\text{L}^2}{\text{T}^2}$
-
$\frac{\text{T}^2}{\text{L}^2}$
Which of the following effects could not be explained by Maxwell's electromagnetic wave theory?
Dispersion can take place for
|
(a) Transverse waves only but not for longitudinal waves |
|
(b) Longitudinal waves only but not for transverse waves |
|
(c) Both transverse and longitudinal waves |
|
(d) Neither transverse nor longitudinal waves |
Which type of substance is copper?
In the forward bias arrangement of a PN-junction diode
|
(a) The N-end is connected to the positive terminal of the battery |
|
(b) The P-end is connected to the positive terminal of the battery |
|
(c) The direction of current is from N-end to P-end in the diode |
|
(d) The P-end is connected to the negative terminal of battery |
Assertion : If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic region.
Reason : Force is directly proportional to the magnetic field applied.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If assertion is false but reason is true. |
Work of electric motor is
|
(a) To convert ac into dc |
(b) To convert dc into ac |
|
(c) Both (a) and (b) |
(d) To convert ac into mechanical work |
The correct curve between the stopping potential (V) and intensity of incident light (I) is
|
(a)
|
(b)
|
(c)
|
(d)
|
A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1°C if 3.0cal of heat is added to it. The gas may be:
- Helium.
- Argon.
- Oxygen.
- Carbon dioxide.