Home
Current Affairs January 2024

What is the correct answer?

4

To attain the synchronous orbit, the launch of a satellite, is done from a place

A. On equator

B. On 30° latitude

C. On 45° latitude

D. On the poles

Correct Answer :

A. On equator


Related Questions

What is the correct answer?

4

When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

A. Imaginary work

B. Negative work

C. Virtual work

D. None of these

What is the correct answer?

4

A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is

A. 0.25

B. 0.50

C. 0.75

D. 1.0

What is the correct answer?

4

A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be

A. Less than that on BC

B. More than that of BC

C. Equal to that on BC

D. None of these

What is the correct answer?

4

A weight of 100 kg is supported by a string whose ends are attached to pegs A and B at the same level shown in below figure. The tension in the string is

A. 50 kg

B. 75 kg

C. 100 kg

D. 120 kg

What is the correct answer?

4

If a particle moves with a uniform angular velocity ω radians/sec along the circumference of a circle of radius r, the equation for the velocity of the particle, is

A. v = ω √(y² - r²)

B. y = ω √(y - r)

C. v = ω √(r² + y²)

D. v = ω √(r² - y²)

What is the correct answer?

4

If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is

A. 500 metres

B. 1000 metres

C. 1500 metres

D. 2000 metres

What is the correct answer?

4

A 50 kg boy climbs up a 8 m rope in gymnasium in 10 sec. The average power developed by the boy is approximately

A. 400 watts

B. 500 watts

C. 4000 watts

D. None of these

What is the correct answer?

4

The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is

A. Less than 1

B. Equal to 1

C. Between 1 and 2

D. Greater than 2

What is the correct answer?

4

If v and ω are linear and angular velocities, the centripetal acceleration of a moving body along the circular path of radius r, will be

A. r/v²

B. v²/r

C. r/ω²

D. ω²/r

What is the correct answer?

4

If the resultant of two forces P and Q acting at an angle θ makes an angle α with P, then tan α equals

A. P sin θ/P - Q cos θ

B. Q sin θ/P + Q cos θ

C. P sin θ/P + Q tan θ

D. Q sin θ/P + Q sin θ

What is the correct answer?

4

If two forces each equal to T in magnitude act at right angles, their effect may be neutralised by a third force acting along their bisector in opposite direction whose magnitude will be

A. 2 T

B. 1/2 T

C. √2 T

D. 3 T

What is the correct answer?

4

The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is

A. 98 m

B. 490 m

C. 980 m

D. 1960 m

What is the correct answer?

4

A string of length 90 cm is fastened to two points A and B at the same level 60 cm apart. A ring weighing 120 g is slided on the string. A horizontal force P is applied to the ring such that it is in equilibrium vertically below B. The value of P is:

A. 40 g

B. 60 g

C. 80 g

D. 100 g

What is the correct answer?

4

Pick up the correct statement from the following:

A. If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities

B. If a sphere impinges directly on an equal sphere which is at rest, then a fraction ½(1 - e2) the original kinetic energy is lost by the impact

C. If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles

D. All the above

What is the correct answer?

4

The reaction at the support B of the beam shown in below figure is

A. 1.6 t

B. 9.6 t

C. 8.5 t

D. 0.5 t

What is the correct answer?

4

If two bodies of masses M1 and M2(M1 > M2) are connected by alight inextensible string passing over a smooth pulley, the tension in the string, will be given by

A. T = g(M1 - M2)/(M1 + M2)

B. T = g(M1 + M2)/(M1 × M2)

C. T = g(M2 - M1)/(M1 + M2)

D. T = g(M2 + M1)/(M2 - M1)

What is the correct answer?

4

If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is

A.

B.

C. 10°

D. 11°

What is the correct answer?

4

In case of S.H.M. the period of oscillation (T), is given by

A. T = 2ω/π²

B. T = 2π/ω

C. T = 2/ω

D. T = π/2ω

What is the correct answer?

4

When a body falls freely under gravitational force, it possesses

A. Maximum weight

B. Minimum weight

C. No weight

D. No effect on its weight

What is the correct answer?

4

Coefficient of friction depends on

A. Nature of surfaces only

B. Area of contact only

C. Both (A) and (B)

D. None of the above

What is the correct answer?

4

For perfectly elastic bodies, the value of coefficient of restitution is

A. Zero

B. 0.5

C. 1.0

D. Between 0 and 1

What is the correct answer?

4

The frequency of oscillation on moon as compared to that on earth, will be

A. 2.44 times more

B. 2.44 times less

C. 3 times less

D. 3 times more

What is the correct answer?

4

A system of coplanar forces acting on a rigid body can be reduced to

A. One force only

B. One couple only

C. One force and one couple only

D. None of the above

What is the correct answer?

4

A point subjected to a number of forces will be in equilibrium, if

A. Sum of resolved parts in any two directions at right angles, are both zero

B. Algebraic sum of the forces is zero

C. Two resolved parts in any two directions at right angles are equal

D. Algebraic sum of the moments of the forces about the point is zero

What is the correct answer?

4

On a mass m describing a circular path of radius r, the centrifugal force

A. Acts tangentially to the circular path

B. Acts towards the centre of rotation

C. Acts away from the centre of rotation

D. Is mw2r/g kgf

What is the correct answer?

4

A simple pendulum of length 1 has an energy E when its amplitude is A. If its amplitude is increased to 2 A, the energy becomes

A. E

B. E/2

C. 2E

D. 4E

What is the correct answer?

4

For a given velocity of a projectile, the range is maximum when the angle of projection is

A. 30°

B. 45°

C. 90°

D.

What is the correct answer?

4

The C.G. of a thin hollow cone of height h, above its base lies on the axis, at a height of

A. h/3

B. h/4

C. 2h/3

D. 3h/4

What is the correct answer?

4

In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is

A. 30

B. 50

C. 60

D. 80

What is the correct answer?

4

According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on

A. A point

B. A straight line

C. Two straight lines

D. A triangle