#2181

A connection between·two end points, either physical or logical, over which data may ttavel in both directions simultaneously is• called

(a) .None of these .

(b) Networks

(c) Duplex • .

(d) Datalink

Explanation: The source answer is option B (Duplex • .). Review the stem and options, then update the correct answer in Question Bank if the source key is wrong.

#2182

Microsoft Word ? to read through document To a you may:

(a) line cursor one up B. Dragging the scroll box

(b) cursor one paragraph up D.OnlyA&B

(c) cursor one page up the A. Use

(d) cursor one screen up C. Use your key ENTER to

Explanation: The source answer is option D (cursor one paragraph up D.OnlyA&B). Review the stem and options, then update the correct answer in Question Bank if the source key is wrong.

#2183

If you smuggle goods into the country, they may be …… by the customs authority

(a) Possessed

(b) Confiscated

(c) Punished

(d) Fined

Explanation: Smuggled goods are confiscated by customs.

#2184

Resultant of electromagnetic force (i.e. reaction) between two surfaces may act through vertex

(a) Without the cone of friction

(b) Straight to the cone of friction

(c) Within the cone of friction

(d) None of these

Explanation: The resultant reaction force between surfaces must lie within the friction cone defined by the normal and limiting friction; otherwise slipping occurs.

#2185

149 An instrument which can float in the liquid to be tested and by means of which the specific gravity of the liquid may be determined is

(a) hydrometer

(b) lactometer

(c) barometer

(d) siphon

Explanation: A hydrometer floats at a level depending on the liquid's density, allowing determination of specific gravity.

#2186

An object that has ______ may have energy because of its place.

(a) Potential energy

(b) Velocity

(c) Speed

(d) Kinetic energy

Explanation: Energy because of position is potential energy, so option D is correct.

#2187

Polishing a surface may

(a) Fix friction

(b) Reduce friction

(c) Damage friction

(d) None of these

Explanation: Polishing smooths surface roughness, typically reducing friction between contacting surfaces.

#2188

134. Two masses A and B of 10 kg and 5 kg respectively are connected with a string passing over a frictionless pulley fixed at a corner of a table as shown in the adjoining diagram. The coefficient of friction of A with the table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is

(a) 5 kg

(b) 15 kg

(c) 0 kg

(d) 10 kg

Explanation: Require static friction μ_s(10 + m_C)g ≥ weight of hanging 5 kg (5g); solving 0.2*(10 + m_C)*9.8 ≥ 49 gives m_C ≥ 15 kg.

#2189

Two masses A and B of 10 kg and 5 kg respectively, are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown. The coefficient of friction of A with the table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is

(a) 5 kg

(b) 10 kg

(c) 0 kg

(d) 15 kg

Explanation: Require μ(10 + C)g ≥ 5g ⇒ 0.2(10 + C) ≥ 5 ⇒ 10 + C ≥ 25 ⇒ C ≥ 15 kg, so minimum C = 15 kg.

#2190

Pressure may be defined as change in ____ per second per unit area.

(a) Force

(b) Energy

(c) Momentum

(d) Work done

Explanation: In kinetic theory pressure arises from rate of change of momentum delivered per unit area per second.

#2191

Pressure may be defined as:

(a) Force per second per unit area

(b) Change in energy

(c) Work done

(d) Change in momentum

Explanation: The block's explanatory text indicates B; pressure arises from the rate of change of momentum per unit area due to molecular impacts.

#2192

A moon rotates about its axis. In future scientists may wish to put a satellite into an orbit around the moon such that the satellite remains stationary above one point on moon surface, the period of rotation of moon about its axis is 27.4 days, what is the radius of required orbit?

(a) 8.86 × 10^6 m

(b) 4.23 × 10^? m

(c) 6.96 × 10^8 m

(d) 3.59 × 10^7 m

Explanation: Using orbital period relation (Kepler's third law) the geostationary orbit radius for T = 27.4 days is approximately 8.86×10^6 m; OCR marks option C.

#2193

A body at rest may have

(a) energy

(b) acceleration

(c) speed

(d) momentum

Explanation: A body at rest can possess potential energy (or internal energy), so having energy is possible despite zero speed and momentum.

#2194

315 A body at rest may have

(a) speed

(b) momentum

(c) velocity

(d) energy

Explanation: A body at rest can still possess energy (e.g., potential energy), so option D is correct.

#2195

A sample of an ideal gas may (i) expand adiabatically, or (ii) expand isothermally. The net flow of heat into the gas from the exterior is

(a) positive in each case

(b) zero in each case

(c) negative for (i) and positive for (ii)

(d) zero in (i) and positive for (ii)

Explanation: In adiabatic expansion (i) heat flow is zero; in isothermal expansion (ii) heat flows into the gas to compensate the work, so zero for (i) and positive for (ii).

#2196

A glass may not break when it falls to a carpeted floor because of the ______ to stop.

(a) Short time

(b) Long time

(c) Both a & b

(d) None of these

Explanation: A carpet increases the stopping time, reducing force and preventing breakage, so option B.

#2197

327. Which of the following sets of concurrent forces may be in equilibrium?

(a) F1 = 3 N, F2 = 5 N, F3 = 0 N

(b) F1 = 3 N, F2 = 5 N, F3 = 6 N

(c) F1 = 3 N, F2 = 5 N, F3 = 1 N

(d) F1 = 3 N, F2 = 5 N, F3 = 15 N

Explanation: Three concurrent forces can be in equilibrium if they satisfy the triangle inequality; 6 < 3 + 5 so option D can form a closed triangle.

#2198

External forces may or may not be _____

(a) Balanced

(b) Identical

(c) Opposite

(d) Contradictory

Explanation: External forces acting on a body can be balanced or unbalanced depending on the situation.

#2199

The magnitude of the resultant of two forces may be increased by

(a) increasing the angle between them

(b) drawing the parallelogram to represent them

(c) drawing the forces perpendicularly

(d) decreasing the angle between them

Explanation: Bringing two forces closer in direction (decreasing the angle) increases their vector sum, so decreasing the angle increases the resultant's magnitude.

#2200

A body in equilibrium may not have:

(a) Momentum

(b) Kinetic energy

(c) Acceleration

(d) Velocity

Explanation: A body in equilibrium has zero net force and therefore may not have acceleration (acceleration is zero).

May 2024 Current Affairs MCQs & Solutions

A connection between·two end points, either physical or logical, over which data may ttavel in both directions simultaneously is• called

Microsoft Word ? to read through document To a you may:

If you smuggle goods into the country, they may be …… by the customs authority

Resultant of electromagnetic force (i.e. reaction) between two surfaces may act through vertex

149 An instrument which can float in the liquid to be tested and by means of which the specific gravity of the liquid may be determined is

An object that has ______ may have energy because of its place.

Polishing a surface may

Two masses A and B of 10 kg and 5 kg respectively, are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown. The coefficient of friction of A with the table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is

Pressure may be defined as change in ____ per second per unit area.

Pressure may be defined as:

A moon rotates about its axis. In future scientists may wish to put a satellite into an orbit around the moon such that the satellite remains stationary above one point on moon surface, the period of rotation of moon about its axis is 27.4 days, what is the radius of required orbit?

A body at rest may have

315 A body at rest may have

A sample of an ideal gas may (i) expand adiabatically, or (ii) expand isothermally. The net flow of heat into the gas from the exterior is

A glass may not break when it falls to a carpeted floor because of the ______ to stop.

327. Which of the following sets of concurrent forces may be in equilibrium?

External forces may or may not be _____

The magnitude of the resultant of two forces may be increased by

A body in equilibrium may not have: