Consider the system shown in figure. The pulley and the string are light and all the surfaces are frictionless. The tension in the string is (take g = 10 ms-2)
0 N
1 N
2 N
5 N
Assertion: Heavy water is used as moderator in nuclear reactor.
Reason: Water cool down the fast neutron
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.
Assertion: Unlike electric force and gravitational forces, nuclear force has limited range.
Reason: Nuclear force do not obey inverse square law.
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.
Assertion: When a charged particle moves in a circular path. It produces electromagnetic wave.
Reason: Charged particle has acceleration
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
Assertion: KE is conserved at every instant of elastic collision.
Reason: No deformation of matter occurs in
elastic collision.
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.
Assertion: Value of radius of gyration of a body depends on axis of rotation.
Reason: Radius of gyration is root mean square distance of particle of the body from the axis of rotation.
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.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
Radius of gyration of body a given axis is equal to
k =
It thus depends upon shape and size of the body, position and configuration of the axis of rotation and also on distribution of mass of body w.r.t. the axis of rotation
A body of mass 60 kg is suspended by means of three strings P Q and R as shown in the figure is in equilibrium. The tension in the string P is
130.9 g N
60 g N
50 g N
103.9 g N
The angular amplitude of simple pendulum is θo. The maximum tension in its string will be
mg ( 1 - θ0 )
mg ( 1 + cosθ0)
mg ( 1 - cos)
mg ( 1 + cos)
The temperature of a body is increased from 73o C to 327o C. Then the ratio of emissive power is
1/9
1/27
27
81
A cylindrical tank is filled with water to level of 3 m. A hole is opened at height of 52.5 cm from bottom. The ratio of the area of the hole to that of cross-sectional area of the cylinder is 0.1. The square of the speed with which water is coming out from the orifice is (Take g = 10 m s-2)
50 m2 s-2
40 m2 s-2
51.5 m2 s-2
50.5 m2 s-2