Suppose all vertices in a graph G have degree k, where k is an odd number. The number of edges in G is

• even
• odd
• a multiple of k
• a divisor of k
• option3

2tan-1(1/2)

• tan-1(3/4)
• tan-1(4/3)
• tan-1(7/12)
• tan-1(12/7)
• option2

दो घटनाएँ a और b स्वतंत्र हैं यदि

• P(A U B) = P(A).P(B)
• P(A U B) = P(A)/P(B)
• P(A ∩ B) = P(A).P(B)
• P(A ∩ B) = P(A)/P(B)
• option3

Where should an object be placed infront of a convex lens to get a real image of the same size of the object?

• At the principal focus of the lens.
• At twice the focal length of the lens.
• At infinity
• Between the optical centre of the lens and its principal focus.
• option2

The part of human eye at which image of an object is formed is

• Cornea
• Iris
• Pupil
• Retina
• option4

The value of refractive indix (μ) of a medium is

• sini / sinr
• sinr / sini
• sini * sinr
• sini + sinr
• option4

Twinkling of stars are due to which phenomena of light ?

• Reflection of light
• Refraction of light
• Scattering of light
• Dispersion of light
• option2

Which of the following is the S.I. unit of magnification of any lens?

• Meter
• Centimetre
• Millimeter
• Unit less
• option2

The resistance of a conductor depends upon which of the following?

• length of the conductor
• Area of cross section of the conductor
• On the nature of the material of the conductor
• All of the above
• option4

Which of the following is the S.I. unit of electric power?

• Watt
• Watt / hour
• ampere
• ohm
• option1