MCQOPTIONS
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MCQOPTIONS
This section includes 439 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
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. | None of the above |
| Answer» C. acts away from the centre of rotation | |
| 252. |
Lami's theroem states that |
| A. | three forces acting at a point are always in equilibrium |
| B. | if three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium |
| C. | three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two |
| D. | three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two |
| Answer» D. three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two | |
| 253. |
The centre of gravity of a homogenous body is the point at which the whole |
| A. | volume of the body is assumed to be concentrated |
| B. | area of the surface of the body is assumed to be concentrated |
| C. | weight of the body is assumed to be concentrated |
| D. | all the above. |
| Answer» D. all the above. | |
| 254. |
A cable loaded with 0.5 tonne per horizontal metre span is stretched between supports in the same horizontal line 400 m apart. If central dip is 20 m, the minimum tension in the cable, will be |
| A. | 200 tonnes at the centre |
| B. | 500 tonnes at the centre |
| C. | 200 tonnes at the right support |
| D. | 200 tonnes at the left support. |
| Answer» C. 200 tonnes at the right support | |
| 255. |
A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is |
| A. | 0.25 |
| B. | 0.33 |
| C. | 0.40 |
| D. | 0.50 |
| Answer» E. | |
| 256. |
From the circular plate of a diameter 6 cm is cut out a circular plate whose diameter is equal to radius of the plate. The c.g. of the remainder shifts from the original position through |
| A. | 0.25 cm |
| B. | 0.50 cm |
| C. | 0.75 cm |
| D. | 1.00 cm. |
| Answer» C. 0.75 cm | |
| 257. |
A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The efficiency of the lifting machine is |
| A. | 50% |
| B. | 40% |
| C. | 55% |
| D. | 30%. |
| Answer» C. 55% | |
| 258. |
In the structure shown in below figure, the member which carries zero force, is |
| A. | AB |
| B. | BC |
| C. | BE |
| D. | All the above |
| Answer» E. | |
| 259. |
The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface |
| A. | uneven distribution of the gravitational field |
| B. | gravity of the sun and the moon |
| C. | aerodynamic forces |
| D. | none of these. |
| Answer» E. | |
| 260. |
The point about which combined motion of rotation and translation of a rigid body takes place, is known as |
| A. | Virtual centre |
| B. | Instantaneous centre |
| C. | Instantaneous axis |
| D. | Point of rotation |
| Answer» C. Instantaneous axis | |
| 261. |
The intrinsic equation of catenary is |
| A. | S = c tan ψ |
| B. | y = c cosh x/c |
| C. | y = c cosh ψ |
| D. | y = c sinh ψ. |
| Answer» B. y = c cosh x/c | |
| 262. |
Which one of the following laws is not applicable to a simple pendulum ? |
| A. | The time period does not depend on its magnitude |
| B. | The time period is proportional to its length l |
| C. | The time period is proportional to √l where l is length |
| D. | The time period is inversely proportional to √g where g is the acceleration due to gravity. |
| Answer» C. The time period is proportional to √l where l is length | |
| 263. |
The following is not a law of static friction : |
| A. | The force of friction always acts in a direction opposite to that in which the body tends to move |
| B. | The force of friction is dependent upon the area of contact |
| C. | The force of friction depends upon the roughness of the surface |
| D. | The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces. |
| Answer» B. The force of friction is dependent upon the area of contact | |
| 264. |
The angle of friction is : |
| A. | The ratio of the friction and the normal reaction |
| B. | The force of friction when the body is in motion |
| C. | The angle between the normal reaction and the resultant of normal raction and limiting friction |
| D. | The force of friction at which the body is just about to move. |
| Answer» D. The force of friction at which the body is just about to move. | |
| 265. |
The equation of motion of a particle starting from rest along a straight line is x = t³ - 3l² + 5. The ratio of the velocities after 5 sec and 3 sec will be |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 266. |
The centre of gravity of a plane lamina will not be at its geometrical centre if it is a |
| A. | circle |
| B. | equilateral triangle |
| C. | rectangle |
| D. | right angled triangle. |
| Answer» E. | |
| 267. |
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. |
| Answer» C. two straight lines | |
| 268. |
The characteristic of a couple, is : |
| A. | algebraic sum of forces, constituting a couple is zero |
| B. | algebraic sum of moments of forces, constituting a couple, about any poin, is same |
| C. | a couple can be balanced only by a couple but of opposite sense |
| D. | all the above. |
| Answer» E. | |
| 269. |
For a simple pendulum, time period for a beat, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 270. |
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. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 271. |
Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for |
| A. | half oscillation |
| B. | quarter oscillation |
| C. | complete oscillation |
| D. | none of these. |
| Answer» D. none of these. | |
| 272. |
Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of |
| A. | one-half of the total height above base |
| B. | one-third of the total height above base |
| C. | one-fourth of the total height above base |
| D. | none of these. |
| Answer» C. one-fourth of the total height above base | |
| 273. |
The reaction at the central support B of the beam ABC hinged at D shown in below figure is |
| A. | 2 t |
| B. | 5.8 t |
| C. | 0.2 t |
| D. | 3.5 t |
| Answer» C. 0.2 t | |
| 274. |
A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be |
| A. | zero |
| B. | 0.5 m/sec |
| C. | 1.0 m/sec |
| D. | 2.0 m/sec. |
| Answer» D. 2.0 m/sec. | |
| 275. |
The moment of intertia of a circular lamina of diameter d, about an axis perpendicular to the plane of the lamina and passing through its centre, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 276. |
The C.G. of a hemisphere from its base measured along the vertical radius is at a distance of |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 277. |
If l is the span of a light suspension bridge whose each cable carries total weight (w) and the central dip is y, the horizontal pull at each support, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 278. |
A square hole is made in a circular lamina, the diagonal of the square is equal to the radius of the circle as shown in below figure the shift in the centre of gravity is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 279. |
A body A of mass 6.6 kg which is lying on a horizontal platform 4.5 m from its edge is connected to the end of a light string whose other end is supporting a body of mass 3.2 kg as shown in below figure. If the friction between the platform and the body A is 1/3, the acceleration is |
| A. | 0.5 m/sec² |
| B. | 0.75 m/sec² |
| C. | 1.00 m/sec² |
| D. | 1.25 m/sec² |
| Answer» D. 1.25 m/sec² | |
| 280. |
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. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 281. |
Two loads of 50 kg and 75 kg are hung at the ends of a rope passing over a smooth pulley shown in below figure. The tension in the string is : |
| A. | 50 kg |
| B. | 75 kg |
| C. | 25 kg |
| D. | 60 kg |
| Answer» E. | |
| 282. |
If α is the angular acceleration of a compound pendulum whose angular displacement is θ, the frequency of the motion is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 283. |
The ratio of the reactions RA and RB of a simply supported beam shown in below figure is |
| A. | 0.50 |
| B. | 0.40 |
| C. | 0.67 |
| D. | 1.00 |
| Answer» E. | |
| 284. |
u1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 285. |
Maximum efficiency of a screw jack for the angle of friction φ, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 286. |
The velocity of a body fallen from height h, on reaching the ground is given by |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 287. |
The height at which the end of a rope of length l should be tied so that a man pulling at the other end may have the greatest tendency to overturn the pillar, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 288. |
The moment of inertia of the shaded portion of the area shown in below figure about the X-axis, is |
| A. | 229.34 cm⁴ |
| B. | 329.34 cm⁴ |
| C. | 429.34 cm⁴ |
| D. | 529.34 cm⁴ |
| Answer» D. 529.34 cm⁴ | |
| 289. |
The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is b and the vertical side is a, from its vertical face is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 290. |
The centre of gravity of the trapezium as shown in below figure from the side is at a distance of |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 291. |
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. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 292. |
For a simple pendulum, the period of one oscillation is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 293. |
The velocity ratio of the differential wheel and axle is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 294. |
For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is |
| A. | 1 sec |
| B. | 2 sec |
| C. | 3 sec |
| D. | 4 sec |
| Answer» D. 4 sec | |
| 295. |
The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» D. D | |
| 296. |
The distance of the c.g. of a semi-circular arc of radius r from its diameter along the radius of symmetry, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 297. |
Pick up the correct statement from the following for the structure shown in below figure. |
| A. | The horizontal reaction at A is 2√3t ← |
| B. | The horizontal reaction at C is 2√3t → |
| C. | The vertical reaction at A is zero |
| D. | All the above |
| Answer» E. | |
| 298. |
M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 299. |
When a body of mass M1 is hanging freely and an other of mass M2 lying on a smooth inclined plane(α) are connected by a light indextensible string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» C. C | |
| 300. |
A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be |
| A. | 10 m/sec |
| B. | 15 m/sec |
| C. | 20 m/sec |
| D. | 25 m/sec. |
| Answer» D. 25 m/sec. | |