Physics
General
Easy
Question
The motion of a particle along a straight line is described by the function .X=(3T-2)2 Calculate the acceleration after 10 s.
- 9 ms-2
- 18ms-2
- 36ms-2
- 6ms-2
The correct answer is: 18ms-2
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A long insulated copper wire is closely wound as a spiral of N turns. The spiral has inner radius a and outer radius b. The spiral lies in the 
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| 900553 |
A long insulated copper wire is closely wound as a spiral of N turns. The spiral has inner radius a and outer radius b. The spiral lies in the plane and a steady current flows through the wire. The Z-component of the magnetic field at the centre of the spiral is
| 900553 |
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In the adjacent figure is shown a closed path 
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A current I enters a circular coil of radius R, branches into two parts and then recombines as shown in the circuit diagram
The resultant magnetic field at the centre of the coil is
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The resultant magnetic field at the centre of the coil is
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The figure shows the cross-section of a long cylindrical conductor of radius a carrying a uniformly distributed current i. The magnetic field due to current at P is
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Rohit completes a semi circular path of radius R in 10 seconds. Calculate average speed and average velocity in ms-1.
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If Young’s modulus of elasticity Y for a material is one and half times its rigidity coefficient 
the Poisson’s ratio 
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A current 
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The magnetic field at the centre of the loop is 
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The magnetic field at the centre of the loop is times.
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A part of a long wire carrying a current is bent into a circle of radius r as shown in figure. The net magnetic field at the centre O of the circular loop is
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A wire shown in figure carries a current of 40 A. If 
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A car covers one third part of its straight path with speed V1 and the rest with speed V2 . What is its average speed ?
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