# Physics Concepts

##### A car having a mass of 1000 kg is moving at a speed of 30 m/s.

A car having a mass of 1000 kg is moving at a speed of 30 m/s. Brakes are applied to…

##### Two wheels A and B of moment of inertia I and 3 I respectively

Two wheels A and B of moment of inertia I and 3 I respectively are spinning in the opposite direction…

##### The radius of the sphere is measured using a meter

The radius of the sphere is measured using ameter screw gauge having a pitch 0.5 mmand 50 divisions on it….

##### The moment of inertia of a thin uniform circular disc

The moment of inertia of a thinuniform circular disc about one of itsdiameter is I. The moment of inertiaabout an…

##### The moment of ineltia of a metallic hollow cylinder

The moment of ineltia of a metallic hollow cylinder of radius ‘R’ about an axis passing through its centre and…

##### The bi-polar transistor is a

The bi-polar transistor is a a) Current and voltage sensitive deviceb) Current sensitive devicec) Voltage sensitive deviced) Current sensitive device…

##### A body moving through air at a high speed v

A body moving through air at a high speed v experiences a retarding force, F = Kapv^x, where a is…

##### A converging lens of focal length 50 cm is placed

A converging lens of focal length 50 cm is placed coaxially in contact with another lens of unknown focal length….

##### The bi-polar transistor is a

The bi-polar transistor is a a) Current and voltage sensitive deviceb) Current sensitive devicec) Voltage-sensitive deviced) Current sensitive device for…

##### According to right hand thumb rule

According to right hand thumb rule, the direction of magnetic induction if current is directed in anti-clockwise direction is a)…

##### A man starts walking from a point on the surface of earth

A man starts walking from a point on the surface of earth (assumed smooth) and reaches diagonally opposite point. What…

##### Transverse waves of same frequency are generated

Transverse waves of same frequency are generated in two steel wires A and B. The diameter of A is twice…

##### A force of 150 N produces an acceleration

A force of 150 N produces an acceleration of 2ms^-2 in a body and a force of 200N produces an…

##### A lift is moving down with acceleration a

A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The…

##### If 97.52 is divided by 2.54, the correct

If 97.52 is divided by 2.54, the correct result in terms of significant figures is a) 38.4 b) 38.3937c) 38.394…

##### When a sphere of moment of inertiaI

When a sphere of moment of inertiaI moves down an inclined plane the percentage of energy, which is translational energy,…

##### A body acted upon by a variable force

A body acted upon by a variable force F = 3 +0.5x. Work done in moving the body from x=…

##### Taking into account the significant figures

Taking into account the significant figures, what is the value of 9,9 m +0.0999 m a) 10.0 m b) 10…

##### A block of mass 5kg is moving horizontally

A block of mass 5kg is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5 N…

##### If the component of one vector A

If the component of one vector A along another vector B is equal to A. Then the two mentioned vectors…

##### A projectile is thrown with an initial velocity

A projectile is thrown with an initial velocity of 50 m/s. The maximum horizontal distance which this projectile can travel…

##### The ratio of the dimension of Planck’s constant

The ratio of the dimension of Planck’s constant h (Kgm2 Is) and that of the moment of inertia mass x…

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