# NEET  Physics  Mock Test

1. If n denotes a positive integer, h the Planck’s constant, q the charge and B the magnetic field, then the quantity $\dfrac{nh}{2\pi qB}$ has the dimension of

 area length speed acceleration

2. A Vernier calipers has 1 mm marks on the main scale. It has 20 equal divisions on the Vernier scale which match with 16 main scale divisions. For this Vernier calipers, the least count is

 0.02 mm 0.05 mm 0.1 mm 0.2 mm

3. An ideal gas heat engine operates in a Carnot cycle between 227ºC and 127ºC. It absorbs 6 kcal at the higher temperature. The amount of heat (in kcal) converted into work is equal to

 4.8 3.5 1.6 1.2

4. A body of mass 100 gram, tied at the end of a string of length 3 m rotates in a vertical circle and is just able to complete the circle. If the tension in the string at its lowest point is 3.7 N, then its angular velocity will be ______ (g = 10 m/s2)

5. A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s2. The acceleration of the car is

 9.8 m/s2 1.8 m/2 2 m/s2 2.7 m/s2

6. A cyclist goes round a circular path of circumference 343 m in $\sqrt{22}$s. The angle made by him, with the vertical is

 42° 43° 44° 45°

7. A cyclist turns around a curve at 15 miles per hour. If he turns at double the speed, the tendency of overturn is

8. A particle of mass m is moving in a horizontal circle of radius R with uniform speed v. When it moves from one point to a diametrically opposite point its

 kinetic energy changes by Mv2/4 momentum does not change momentum changes by 2 Mv2 kinetic energy changes by Mv2

9. A stone of mass 250 gram, attached at the end of a string of length 1.25 m is whirled in a horizontal circle at a speed of 5 m/s. What is the tension in the string?

 2.5 N 5 N 6 N 8 N

10. A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the outer end is

 $\dfrac{ML\omega^2}{2}$ MLω2 $\dfrac{ML^2\omega^2}{2}$ $\dfrac{ML\omega^2}{4}$

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