Physics – Class 12 Mock Test 7

10%

Question 1 of 10

1. Stephen is thinking of going to the hospital for checking whether he has tuberculosis since he believes that he may have some early symptoms of the disease. His friend suggests him to do an x-ray checkup to clear up the confusion. Is the suggestion made by Stephen’s friend going to help him?

False

True

Question 1 of 10

Question 2 of 10

2. What is the condition for dispersion without deviation?

\(\frac {\delta}{\delta^{'}}\)=0

δ-δ'=0

δ+δ'=0

δ × δ^'=0

Question 2 of 10

Question 3 of 10

3. Identify the factor is not the same for coherent waves.

Amplitude

Phase difference constant

Frequency

Wavelength in phase with each other

Question 3 of 10

Question 4 of 10

4. The speed of light in air is 3 × 10⁸ m/s. If the refractive index of glass is 1.5, find the time taken by light to travel a distance of 10 cm in the glass.

500 × 10^-10 s

50 × 10^-10 s

0.5 × 10^-10 s

5 × 10^-10 s

Question 4 of 10

Question 5 of 10

5. The wavelength of light coming from a sodium source is 589 nm. What will be its wavelength in the water?

443 nm

625 nm

125 nm

789 nm

Question 5 of 10

Question 6 of 10

6. Which of the following color is the ocean?

Red

Black

Orange

Blue

Question 6 of 10

Question 7 of 10

7. What is the SI unit of power of a lens?

Unit less

Watts

Joule

Diopter

Question 7 of 10

Question 8 of 10

8. Which of the following is a necessary condition for total internal reflection?

The angle of incidence in the denser medium must be lesser than the critical angle for the two media

The angle of reflection in the denser medium must be greater than the critical angle for the two media

The angle of incidence in the rarer medium must be greater than the critical angle for the two media

The angle of incidence in the denser medium must be greater than the critical angle for the two media

Question 8 of 10

Question 9 of 10

9. If a wave undergoes refraction, what will be the phase change?

0^o

270^o

180^o

90^o

Question 9 of 10

Question 10 of 10

10. Pick out the correct increasing order of energy of electromagnetic waves from the following.

E_micro < E_infrared < E_ultraviolet < E_visible < E_gamma

E_infrared < E_micro < E_visible < E_ultraviolet < E_gamma

E_micro < E_infrared < E_visible < E_gamma < E_ultraviolet

E_micro < E_infrared < E_visible < E_ultraviolet < E_gamma

Question 10 of 10