Question
Let the electric field part of an electromagnetic wave
is E = {(2.3 N/C) cos [(1.2 rad/m) y + (2.4 × 108 rad/s)t]} î. Compute the value of wavelength, frequency and the amplitude of the magnetic field part of the wave’ respectively? ÂSolution
The correct answer is C
Which of the following statements about SQL `INDEXES` is generally TRUE?
Which of the following can be used to avoid duplicate entries in a column?
Which SQL clause is used to filter records based on aggregate functions?
In PL/SQL, what type of parameter allows a procedure to both receive a value from the calling environment and return a modified value back to it?
In SQL, the ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW clause applies to:
Which SQL constraint ensures that a column’s values are unique across the table?
Which SQL operator is used to search for a pattern in a column?
Which operator is used to combine results of two SELECT queries and remove duplicates?
Which SQL statement combines the results of two queries and removes duplicates?
In PL/SQL, what type of parameter allows a procedure to both receive a value from the calling environment and return a modified value back to it?
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