Physics
General
Easy

Question

What does the speedometer measure kept in motorbike ?

  1. Average Velocity
  2. Average speed
  3. instantaneous speed
  4. instantaneous Velocity

The correct answer is: instantaneous speed

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A cell is connected between the points A and C of a circular conductor ABCD with O as centre and angle A O C equals 60 degree. If B subscript 1 and B subscript 2 are the magnitudes of the magnetic fields at O due to the currents in  ABC and ADC respectively, then ratio fraction numerator B subscript 1 end subscript over denominator B subscript 2 end subscript end fraction is

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Two thick wires and two thin wires, all of same material and same length, form a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow, at the centre of the loop will be zero in case of

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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 X minus Y plane and a steady current I flows through the wire. The Z-component of the magnetic field at the centre of the spiral is

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In angiosperms, female gametophyte is represented by

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A particle is projected vertically upwards with velocity .30 ms-1 Find the ratio of average speed and instantaneous velocity after 6s.[g=10 ms-1 ]

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A particle moves 4 m in the south direction. Then it moves 3 m in the west direction. The time taken by the particle is 2 second. What is the ratio between average speed and average velocity

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In the adjacent figure is shown a closed path P. A long straight conductor carrying a current I passes through O and perpendicular to the plane of the paper. Then which of the following holds good?

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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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