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WorksheetsCUET LEVEL I NEET MOCK TEST -8 Physics (2025-2026)
Total questions: 45
Worksheet time: 4hrs 45mins
According to the SI convention for rounding off uncertain digits, what are the results of rounding 2.745 and 2.735 to three significant figures?
2.75 and 2.74
2.74 and 2.73
2.74 and 2.74
2.75 and 2.73
Based on dimensional analysis, which of the following formulae for kinetic energy (K) must be ruled out as incorrect?
K = (1/2)mv² + ma
K = (1/2)mv²
K = (3/16)mv²
K = m v²
The diameter of the Earth is 1.28 x 10⁷ m and the diameter of a hydrogen atom is 1.06 x 10⁻¹⁰ m. By how many orders of magnitude is the Earth larger than the hydrogen atom?
3
10
17
21
The candela (cd) is defined by the fixed numerical value of the luminous efficacy of monochromatic radiation of frequency 540 x 10¹² Hz (Kcd) to be:
1.602176634 x 10⁻¹⁹
683
6.62607015 x 10⁻³⁴
6.02214076 x 10²³
For an object in motion, which statement regarding instantaneous speed and the magnitude of instantaneous velocity is always true?
Instantaneous speed is greater than the magnitude of velocity
Instantaneous speed is less than the magnitude of velocity
Instantaneous speed is equal to the magnitude of instantaneous velocity
They are equal only if the acceleration is zero
In a position-time (x-t) graph, what type of curve represents motion with negative acceleration?
A straight line inclined to the time axis
A curve that opens downward
A curve that opens upward
A straight line parallel to the time axis
According to Galileo’s law of odd numbers, what is the ratio of distances traversed by a body falling from rest during equal successive intervals of time?
1: 2: 3: 4
1: 3: 5: 7
1: 4: 9: 16
1: 2: 4: 8
If the initial velocity of a vehicle is doubled while the braking deceleration remains constant, the stopping distance increases by a factor of:
2
3
8
4
Regarding the properties of a null vector (0), which of the following statements is correct?
It has a specific direction in the x-y plane
Its magnitude is zero and its direction cannot be specified
Adding it to a vector A results in the null vector
It results from multiplying a vector A by a negative real number
Two projectiles are launched with the same initial speed at angles (45° + α) and (45° - α). The ratio of their horizontal ranges is:
1: 1
tan α : 1
cos α : sin α
1: 2
In uniform circular motion, why is the centripetal acceleration vector (a꜀) NOT considered a constant vector?
Its magnitude changes with time
It is always directed away from the center
Its direction changes continuously though its magnitude is constant
It is only defined for non-uniform motion
If a vector A makes an angle θ with the x-axis, and its components are Aₓ and Aᵧ, the magnitude of the vector A is given by:
A = Aₓ + Aᵧ
A = (Aₓ² + Aᵧ²)¹/²
A = Aₓ tan θ
A = Aₓ sin θ + Aᵧ cos θ
According to the Law of Inertia, what happens to a body in motion if the net external force acting on it is zero?
It must come to rest eventually
It continues to move with increasing speed
It continues to move with a uniform velocity
It moves in a parabolic trajectory
A batsman hits back a ball straight in the direction of the bowler without changing its initial speed of 12 m s⁻¹. If the mass of the ball is 0.15 kg, the impulse imparted to the ball is:
1.8 N s
3.6 N s
0 N s
5.4 N s
Which of the following is an essential point regarding action and reaction forces in Newton’s third law?
Action force always occurs before the reaction force
Action and reaction forces act on different bodies simultaneously
They act on the same body to produce equilibrium
They are only applicable to bodies in contact
Experiments show that for two given surfaces in contact, the relationship between the coefficient of static friction (μₛ) and the coefficient of kinetic friction (μₖ) is:
μₖ > μₛ
μₖ = μₛ
μₖ = 1/μₛ
μₖ < μₛ
The scalar product (dot product) of two vectors A and B is found to be zero. This implies that:
The vectors are mutually perpendicular
The vectors are parallel
One of the vectors must be a unit vector
The angle between them is 0°
According to the Work-Energy (WE) theorem, the change in kinetic energy of a particle is equal to:
The change in its potential energy
The work done on it by the net force
The rate of change of its momentum
The product of its mass and acceleration
A force F(x) is defined as conservative if it satisfies which of the following conditions?
Work done by it depends on the path taken
It is proportional to the velocity of the object
It always results in a loss of mechanical energy
Work done by it in a closed path is zero
In an elastic glancing collision between two equal masses (m₁ = m₂) where the target mass is initially at rest, the two masses will move after the collision at an angle of:
45°
60°
90°
180°
If the total external force acting on a system of particles is zero, which of the following statements regarding the center of mass is correct?
The center of mass must be at rest at the origin
The center of mass moves with a constant velocity
The center of mass moves with a constant acceleration
The center of mass follows a parabolic trajectory
Under a reflection transformation where all position components change sign (r → -r) and all momentum components change sign (p → -p), the angular momentum vector l = r × p:
Changes its sign to -l
Remains unchanged as l
Becomes a null vector
Changes magnitude but retains its direction
A rigid body is said to be in mechanical equilibrium only if which of the following independent conditions are satisfied?
Total linear momentum and total kinetic energy are zero.
The moment of inertia is constant and the axis is fixed
Total external force is zero and total external torque is zero
The velocity of every particle in the body is identical
Based on the definition of the radius of gyration (k), what is the value of k for a solid cylinder of radius R rotating about its longitudinal axis of symmetry?
k = R/4
k = R/√2
k = R/2
k = R
Kepler's second law (the law of areas) states that the line joining a planet to the Sun sweeps out equal areas in equal intervals of time. This is a direct consequence of:
The gravitational force being a central force, leading to conservation of angular momentum
The conservation of total mechanical energy
The inverse square nature of the gravitational force
The planets moving in perfectly circular orbits
The acceleration due to gravity g(d) at a depth d below the surface of the Earth (where Rₑ is the Earth's radius and g is the surface acceleration) is given by:
g(d) = g(1 + d/Rₑ)
g(d) = g(Rₑ / (Rₑ - d))
g(d) = g(1 - d/Rₑ)
g(d) = g(1 - d²/Rₑ²)
For a satellite in a circular orbit around the Earth, what is the relationship between the magnitude of its kinetic energy (K) and its gravitational potential energy (V), assuming V is zero at infinity?
K = |V|/2
K = |V|
K = 2|V|
K = |V|/4
According to the formula for escape speed vₑ = √(2GMₑ/Rₑ), the escape speed of a body from the Earth does NOT depend on:
The mass of the body being projected (m)
The radius of the Earth (Rₑ)
The universal gravitational constant (G)
The mass of the Earth (Mₑ)
Substances such as rubber or the elastic tissue of the aorta, which can be stretched to cause large strains but do not strictly obey Hooke’s law, are classified as:
Ductile materials
Brittle materials
Elastomers
Perfectly plastic materials
On a stress-strain curve for a metal, if the ultimate tensile strength point (D) and the fracture point (E) are very close to each other, the material is described as:
Ductile
Brittle
Malleable
Elastomeric
The property of a material defined as the fractional change in volume (∆V/V) per unit increase in pressure (p) is known as:
Compressibility
Young's modulus
Bulk modulus
Poisson's ratio
In structural engineering, increasing the depth (d) of a rectangular beam is more effective than increasing its breadth (b) to reduce sagging (δ) because:
δ is independent of the depth of the beam
δ is directly proportional to d³
δ is inversely proportional to b³
δ is inversely proportional to d³
A submarine window of area 0.04 m² is at a depth of 1000 m in an ocean where the density of sea water is 1.03 × 10³ kg m⁻³. If the interior is maintained at sea-level atmospheric pressure, what is the net force acting on the window? (Take g = 10 m s⁻²)
1.03 × 10⁵ N
4.12 × 10⁴ N
4.12 × 10⁵ N
1.01 × 10⁶ N
According to Pascal’s law, if an external pressure is applied to any part of a fluid contained in a vessel, how is this pressure transmitted?
It is transmitted undiminished and equally in all directions
It depends on the viscosity of the fluid
It is transmitted only to the bottom of the vessel
It decreases linearly with depth
In a car lift, compressed air exerts a force F₁ on a small piston of radius 5.0 cm. This pressure is transmitted to a second piston of radius 15 cm. If the mass of the car to be lifted is 1350 kg, find the value of F₁. (Take g = 9.8 m s⁻²)
1470 N
1500 N
1350 N
4410 N
A cylindrical tube of a spray pump has a cross-section of 8.0 cm². One end has 40 fine holes, each of 1.0 mm diameter. If the liquid flow speed inside the tube is 1.5 m min⁻¹, what is the speed of ejection through the holes?
0.32 m s⁻¹
0.64 m s⁻¹
1.50 m s⁻¹
2.10 m s⁻¹
For an incompressible, non-viscous fluid in steady flow, which of the following represents the correct general form of Bernoulli’s equation?
P + 1/2 ρv² + ρgh = constant
P + ρv² + ρgh = constant
P + 1/2 ρv² - ρgh = constant
P + 1/2 ρv + ρgh² = constant
A fully loaded aircraft has a mass of 3.3 × 10⁵ kg and a total wing area of 500 m². If it is in level flight at a speed of 960 km/h, what is the pressure difference between the lower and upper surfaces of the wings? (Take g = 9.8 m s⁻²)
3.3 × 10³ N m⁻²
5.2 × 10³ N m⁻²
6.5 × 10³ N m⁻²
1.2 × 10⁴ N m⁻²
A copper ball of radius 2.0 mm falls through a tank of oil with a terminal velocity of 6.5 cm s⁻¹. If the density of copper is 8.9 × 10³ kg m⁻³ and the density of oil is 1.5 × 10³ kg m⁻³, what is the viscosity of the oil? (Take g = 9.8 m s⁻²)
0.99 kg m⁻¹ s⁻¹
0.55 kg m⁻¹ s⁻¹
1.20 kg m⁻¹ s⁻¹
1.50 kg m⁻¹ s⁻¹
A resistance thermometer measures 101.6 Ω at the triple point of water (273.16 K) and 165.5 Ω at the normal melting point of lead (600.5 K). What is the temperature when the resistance is 123.4 Ω?
350.2 K
384.8 K
401.5 K
420.0 K
An ideal gas thermometer uses the relationship between pressure and temperature at constant volume. At what temperature does the pressure of a low-density gas extrapolate to zero?
0 °C
-273.16 °F
-100 °C
-273.15 °C
A steel rail of length 5 m is prevented from expanding while the temperature rises by 10 °C. If the coefficient of linear expansion is 1.2 × 10⁻⁵ K⁻¹ and Young’s modulus is 2 × 10¹¹ N m⁻², find the thermal stress developed.
1.2 × 10⁷ N m⁻²
2.4 × 10⁷ N m⁻²
3.6 × 10⁷ N m⁻²
4.8 × 10⁷ N m⁻²
Water exhibits anomalous expansion between 0 °C and 4 °C. At what temperature does water reach its maximum density?
0 °C
2 °C
4 °C
100 °C
For an ideal gas, the relationship between the coefficient of volume expansion αᵥ and the absolute temperature T at constant pressure is:
αᵥ = 1/T
αᵥ = T
αᵥ = 3/T
αᵥ = 1/T²
0.15 kg of ice at 0 °C is mixed with 0.30 kg of water at 50 °C. The resulting temperature is 6.7 °C. Calculate the heat of fusion of ice L_f. (s_water = 4186 J kg⁻¹ K⁻¹)
2.26 × 10⁵ J kg⁻¹
3.34 × 10⁵ J kg⁻¹
4.18 × 10⁵ J kg⁻¹
1.10 × 10⁵ J kg⁻¹
