Physics Past Questions and Answers

Two forces, whose resultant is 100N are perpendicular to each other. If one of them makes an angle of 60^o with the resultant, calculate the magnitude. (Sin 60^o = 0.8660, Cos 60^o = 0.500)

A 200.0N
B 173.2N
C 115.5N
D 86.6N
E 50.0N

Question 197:

The graph above shows the expansion of water as the temperature increases from 0^oC. Which of the following deductions from the graph are true? i. Water has its maximum density at Q. ii. The volume of water is greater at 0^oC than at 4^oC. iii. The volume of water decreases uniformly when cooled from 100^oC. iv. When water solidifies, its volume increases

A I and ii only
B I and iii only
C Ii and iii only
D I, ii and iii only
E I, ii and iv only

Question 198:

Two mirrors are inclined as shown in the diagram. A ray of light RO strikes the arrangement at O and emerges along PO. The emergent ray has been deviated through

A 240^o
B 180^o
C 120^o
D 60^o
E 30^o

Question 199:

In the arrangement illustrated above, Y and B are yellow and blue transparent light filters respectively through the filters is

A Blue
B Red
C Yellow
D Green
E Black

Question 200:

A ray of light is incident at an angle of 30^o on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism. (The medium surrounding the prism is air)

A 10.5^o
B 19.5^o
C 21.1^o
D 38.9^o
E 40.5^o