Q.60 An object is placed in front of a concave mirror of radius of curvature 15 cm at: a) 10 cm b) 5 cm Determine the case among (a) & (b), in which image ...

Q.50 Find the focal length of a convex lens of focal length 50 cm in contact with a concave lens of focal length 40 cm? Also find the correct lens system?Ans A. 300 cm, converging lensB. 300 cm, ...

Q.56 Identify the correct truth table for the above circuit which contains NOR gates and also the relevant logic operation performed by this circuit?Ans A.B.

Q.49Ans A.B.C.D.Correct Ans Provided: A

Q.54Ans A.B.C.D.Correct Ans Provided: C

Q.53Ans A. Magnetic momentB. Permeability of free spaceC. Magnetic fieldD. Torsion constantCorrect Ans Provided: B

Q.55 A galvanometer coil has resistance 20 Ω and the metre shows full scale deflection for a current of 2 mA. How will you convert the metre into an ammeter of range 0 to 6 A?Ans A. A ...

Q.51 Which of the following statements is INCORRECT for heat?Ans A. It is measured by the principle of calorimetry.B. The temperature of the two bodies are same even if their heat contents are different.C. Heat content of body ...

Q.59 A body cools from 70°C to 40°C in 5 minute. Calculate the time it takes to cool from 50°C to 20°C, the temperature of the surroundings is 10°C.Ans A. 6 minuteB. 9 minuteC. 5 minuteD. 7 minuteCorrect ...

Q.58 An object of mass 5 kg is sliding with a constant velocity of 12 m/s on a frictionless horizontal table. The force required to keep the object moving with the same velocity isAns A. 15 NB. 0 ...