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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?

4.
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

4.8 kJ

The velocity of second piece can be find out using conservation of momentum.

0 + m₁ v₁ + m₂ v₂ = 2 × v₁ + 1 × 80

⇒ v₁ = - 40 m/s

Negative sign showing that particle is moving in opposite direction of othr particle direction.

The energy imparted to the fragments are converted into their kinetic energy.

∴ Total energy = $\frac{1}{2} m_{1} v_{1}^{2} + \frac{1}{2} m_{2} v_{2}^{2}$

= $\frac{1}{2} \times 2 \times 1600 + \frac{1}{2} \times 1 \times 6400$

= 4800 J

Total energy = 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

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

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