Physics-
General
Easy

Question

A rod of a paramagnetic substance is placed in a non-uniform magnetic field. Which of the following figure shows its alignment in the field ?

  1.    
  2.    
  3.    
  4.    

The correct answer is:

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Students I, II and III perform an experiment for measuring the acceleration due to gravity left parenthesis g right parenthesis using a simple pendulum. They use different lengths of the pendulum and/or record time for different number of oscillations. The observations are shown in the table
Least count for length equals 0.1 blank c m
Least count for time equals 0.1 blank s

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Least count for length equals 0.1 blank c m
Least count for time equals 0.1 blank s

If E subscript I end subscript comma blank E subscript I I end subscript and E subscript I I I end subscriptare the percentage errors in g comma blank i. e. comma blank open parentheses fraction numerator increment g over denominator g end fraction cross times 100 close parentheses for students I, II and III, respectively

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