The ball is projected vertically upward with a velocity of 112 m/s. The time taken by it to return to the point of projection is (g = 10 m/s2)
1) 11 s 2) 33 s 3) 5.5 s 4) none of these Solution: Given initial velocity, u =... View Article
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In the expansion of (1 + x + x2)e-x, the coefficient of x2 is
1) 1 2) -1 3) 1/2 4) -1/2 Solution: (1+ x + x2)e-x = (1 + x + x2)... View Article
The maximum horizontal range of a ball projected with a velocity of 39.2 m/s is (take g = 9.8 m/s2)
1) 100 m 2) 127 m 3) 157 m 4) 177 m Solution: Given u = 39.2 m/s g... View Article
What is the octal equivalent of binary number 111001
1) 69 2) 70 3) 71 4) 82 Solution: Given binary number is 111001. Here we group all the... View Article
What is the hexadecimal equivalent of decimal number 785
1) 1A2 2) 311 3) AB5 4) None of these Solution: Given decimal number is 785. To convert it... View Article
The decimal equivalent of (264)8 is
1) 180 2) 170 3) 166 4) None of these Solution: Given octal number is 264 Multiply each digit... View Article
What is the decimal equivalent of the octal number 217
1) 140 2) 143 3) 150 4) 155 Solution: Given octal number is 217 Multiply each digit of the... View Article
The electronic components used in third generation of computers are
1) Vacuum tubes 2) Transistors 3) Integrated circuit 4) none of these Solution: The third generation of computers used... View Article
The law a + b = b + a is called
1) Closure law 2) Associative law 3) Commutative law 4) Distributive law Solution: The law a + b =... View Article
Subtraction of integers is an operation that is
1) Commutative and associative 2) Not commutative but associative 3) Neither commutative nor associative 4) Commutative but not associative ... View Article
(10001)2 is
1) 16 2) 17 3) 15 4) 14 Solution: Given binary number is 10001 (Multiply each digit of the... View Article
What is the decimal equivalent of the binary number 101010?
1) 20 2) 42 3) 22 4) 23 Solution: Given binary number is 101010 (Multiply each digit of the... View Article
How many bytes are there in a kilobyte
1) 512 2) 1024 3) 2048 4) 4096 Solution: 1 kilobyte = 1024 bytes Hence option (2) is the answer.
Two spheres of the same size, one of mass 2 kg and another of mass 4 kg are dropped simultaneously from the top of Qutub Minar (height = 72 m). When they are 1 above the ground, the two spheres have the same
1) Momentum 2) Kinetic energy 3) Potential energy 4) Acceleration Answer: 4) Acceleration Solution: They will have the same acceleration, since... View Article
An object is projected upwards with a velocity of 100 m/s. It will strike the ground after (approximately)
1) 10 sec 2) 20 sec 3) 15 sec 4) 5 sec Answer: 2) 20 sec Solution: Consider the equation of... View Article
A body is released from a great height and falls freely towards the earth.
A body released from a height falls freely towards earth. Another body is released from the same height exactly one... View Article
A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then
1) Ball P reaches the ground first 2) Ball Q reaches the ground first 3) Both reach the ground at... View Article
A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of
1) 3s 2) 5s 3) 7s 4) 9s Answer: 2) 5s Solution: Distance covered in first three seconds = Distance covered... View Article
A 210 m long train is moving to North at a speed of 25 m/s. A small bird is flying to South a little above the train with speed 5m/s. The time taken by the bird to cross the train is
1) 6s 2) 7s 3) 9s 4) 10s Answer: 2) 7s Solution: Relative velocity of bird w.r.t train=5 – (-25) =30ms... View Article
The path of a particle moving under the influence of a force fixed in magnitude and direction is
1) Straight line 2) Circle 3) Parabola 4) Ellipse Answer: 1) Straight line Solution: The path of a particle moving under... View Article
