Download App

Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsDual Nature of Radiation and Matter1 Mark
MCQ
How does retarding potential vary with the frequency of light causing photoelectric effect?
  • A
    Infinite
  • B
    Zero
  • C
    Decreases
  • D
    Increases
✓

Answer

  1. Increases

Explanation:

The stopping potential is directly proportional to the frequency of light.

Hence, the stopping potential increases with an increase in the frequency of the incident light.

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 [1M]" from Dual Nature of Radiation and Matter→Dual Nature of Radiation and Matter — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

An oscillator is producing FM waves of frequency 2 kHz with a variation of 10 kHz. What is the modulating index

(a) 0.20

(b) 5.0

(c) 0.67

(d) 1.5
→

Four wires each of length 2.0 metres are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct

(a) Couple on loop P will be the highest

(b) Couple on loop Q will be the highest

(c) Couple on loop R will be the highest

(d) Couple on loop S will be the highest
→
An $\alpha$-particle is bombarded on 14N. As a result, a 17O nucleus is formed and a particle is emitted. This particle is a:
  1. Neutron.
  2. Proton.
  3. Electron.
  4. Positron.
→

The dipole moment of each molecule of a paramagnetic gas is 1.5 × 10–23 amp × m2. The temperature of gas is 27oC and the number of molecules per unit volume in it is 2 × 1026 m–3. The maximum possible intensity of magnetisation in the gas will be

(a) 3 × 103 amp/m

(b) 4 × 10–3 amp/m

(c) 5 × 105 amp/m

(d) 6 ×10–4 amp/m
→
What will be the nature of charge on the metal paper clip of electroscope when a negatively charged body is brought in contact with it?
→

Four condensers are joined as shown in the adjoining figure. The capacity of each is 8 μF. The equivalent capacity between the points A and  B will be

(a) 32  μF  

(b) 2 μF

(c) 8 μF   

(d) 16 μF
→
Consider the two idealized systems: (i) a parallel plate capacitor with large plates and small separation and (ii) a long solenoid of length L > > R, radius of cross-section. In (i) E is ideally treated as a constant between plates and zero outside. In (ii) magnetic field is constant inside the solenoid and zero outside. These idealised assumptions, however, contradict fundamental laws as below:
→

In AM, the centpercent modulation is achieved when

(a) Carrier amplitude = signal amplitude

(b) Carrier amplitude ≠  signal amplitude

(c) Carrier frequency = signal frequency

(d) Carrier frequency ≠ signal frequency
→
Figure, shows some of the electric field lines corresponding to an electric field. The figure suggests that,

  1. EA > E8 > Ee
  2. EA = EB = Ee
  3. EA = Ec > EB
  4. EA = Ec < EB.
→
A positively charged rod is brought near an uncharged conductor. If the rod is then suddenly withdrawn, the charge left on the conductor will be:
→