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NEET Physics Solved Question Paper 2004

Multiple Choice Questions

In an orbital motion, the angular momentum vector is

along the radius vector
parallel to the linear momentum
in the orbital plane
perpendicular to the orbital plane

The direction of the angular velocity vector is along

the tangent to the circular path
the inward radius
the outward radius
the axis of rotation

Which of the following velocity-time graphs shows a realistic situation for a body in motion?

A bomb of mass 3.0 kg in air into two pieces of masses 2.0 kg and 1.0 kg. The smaller mass goes at speed of 80 m/s. The total energy imparted to the two fragments is

1.07 kJ
2.14 kJ
2.4 kJ
4.8 kJ

Using mass (M), length (L), time (T) and current (A) as fundamental quantities, the dimension of permittivity is

[ M L^-2 T² A ]
[ M^-1 L^-3 T⁴ A² ]
[ M L T^-2 A]
[ M L² T^-1 A² ]

Assertion: The driver in a vehicle moving with a constant speed on a straight road is in a noninertial frame of reference.

Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false

The waves produced by a motorboat sailing in water are

transverse
longitudinal
longitudinal and transverse
stationary

8.
A sphere of mass Mand radius R is falling in a viscous fluid. The terminal velocity attained by the falling object will be proportional to

R²

R

1/R

1/R²

R²

Stoke's law

F_D = 6 $π$ η r v_T

F_D is the drag force on the sphere falling through the fluid in newtons (N)

η is the viscosity of the fluid in kilogram-per-meter-per-second

r is the radius of the sphere in meters (m)

v_T is the terminal velocity in meter-per-second (m/s)

6 $π$ ηr v_T = $\frac{4}{3} π$ R² (ρ $-$ σ ) g

∴ v ∝ R²

As M is given,

ρ = $\frac{M}{\frac{4}{3} π R^{3}}$

But as R³ increases, M also increases

ρ is a constant

σ also is constant.

∴ v, the terminal velocity ∝ R²

Two springs are connected to a block mass M placed on a frictionless surface as shown in figure. If both the springs have a spring constant k, the frequency of oscillation of the block is

10.

Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increase by a factor of