1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2.0 rad s$$-$$2. Its net acceleration in m s$$-$$2 at the end of 2.0 s is approximately
A
6.0
B
3.0
C
8.0
D
7.0
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
The ratio of escape velocity at earth (ve) to the escape velocity at a planet (vp) whose radius and mean density are twice as that of earth is
A
1 : 4
B
1 : $$\sqrt 2 $$
C
1 : 2
D
1 : 2$$\sqrt 2 $$
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
At what height from the surface of earth the gravitation potential and the value of g are $$-$$5.4 $$ \times $$ 107 J kg$$-$$1 and 6.0 m s$$-$$2 respectively? Take the radius of earth as 6400 km.
A
1400 km
B
2000 km
C
2600 km
D
1600 km
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Coefficient of linear expansion of brass and steel rods are $$\alpha $$1 and $$\alpha $$2. Lengths of brass and steel rods are $$l$$1 and $$l$$2 respectively. If ($$l$$1 $$-$$ $$l$$2) is maintained same at all temperatures, which one of the following relations holds good?
A
$$\alpha $$1$$l$$2 = $$\alpha $$2 2$$l$$1
B
$$\alpha $$1$$l$$1 = $$\alpha $$2l2
C
$$\alpha $$1$$l$$2 = $$\alpha $$2$$l$$1
D
$$\alpha $$1$$l$$22 = $$\alpha $$2$$l$$12
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