Question Answers

If W1 ​,W2 and W3 represent the work done in moving a particle from A to B along three different paths 1,2 and 3 respectively (as shown) in a gravitational field of point mass m, then find the correct relation between W1,W2 and W3 ​ . 2 and 3 respectively (as shown) in a gravitational [...]

The two blocks in an Atwood machine have masses 2.0 kg and 3.0 kg. The work done by gravity during the fourth second after the system is released from rest. The two blocks in an Atwood machine have masses 2.0 kg and 3.0 kg. The work done by gravity during the fourth second after the [...]

For transistor action, which of the following statements are correct. (a) Base, emitter and collector regions should have similar size and doping concentrations. (b) The base region must be very thin emitter and collector regions should have similar size and doping concentrations. (b) The base region must be very thin For transistor action which of [...]

A block of mass 10kg is placed on a rough surface inclined plane of inclination 37^∘ with horizontal. Now the block is released . The work done by the gravitational force and friction force, when the block moves from A to B(sin37^∘ = 0.6, cos37^∘ = 0.8) A block of mass 10kg is placed on [...]

A man displaces a block by 5 m on a rough surface (μ=(1)/(2)) by applying a force 50 N acting at 37^∘ to the horizontal the work done by the applied force is A man displaces a block by 5 m on a rough surface (μ=(1)/(2)) by applying a force 50 N acting at 37^∘ [...]

A force F=−K(yiˆ+xjˆ) (where K is a positive constant) acts on a particle moving in the x-y plane. Starting from the origin, the particle is taken along the positive x-axis to the point (a,0), and then parallel to the y-axis to the point (a,a). The total work done by the force F on the particle [...]

Column I shows the cylindrical region of radius r where a downward magnetic field B exists, where B is increasing at the rate of dB/dt. A rod PQ is placed in different situation as shown. Match the column I with the current statement in column II regarding the induced emf in rod. Column I shows [...]

Column I gives situations involving a charged particle which may be realized under the condition given in column II. Match the situations in column I with the conditions in column II. Column I gives situations involving a charged particle which may be realized under the condition given in column II. Match the situations in column [...]

A frame ABCD is rotating with an angular velocity ω about an axis passing through the point O perpendicular to the plane of paper as shown in fig 4.212. A uniform magnetic field B ˉ is applies into the plane of paper in the region as shown below. Match the following. A uniform but time [...]

The magnetic field in the cylindrical region shown in figure increases at a constant rate of 10 mT/s . Each side of the square loop abcd and defa has a length of 2 cm and a resistance of 2 ohm. Correctly match the current in the wire ad in four situations as listed in column [...]