Question
Which device converts sound waves to electrical
signals?Solution
Microphone: Converts a sound wave into an electrical signal. Loudspeaker: Converts an electrical signal into sound waves. Headphone: Converts electrical energy into mechanical energy to produce sound. Amplifier: • It is used to change the amplitude of a signal. • The purpose of an amplifier is to produce an output signal larger than that of the input signal. • It is used to convert Direct current into Alternate Current.
Select the number from among the given options that can replace the question mark (?) in the following series.
18, 27, 34, 39, 42, ?
Based on the analogy given, find the missing number from the given options.
11 : 13 : 17 : ---------------
Seven people A, B, C, D, E, F and G went to watch a movie. A is the only son of B. B is the mother of C. D is the grandmother of A. E is the sister-in-...
What should come in place of the question mark (?) in the given series based on the English alphabetical order?
RJK, PMI, NPG, LSE, ?
Six students Mani, Nisha, Ojas, Parth, Qasim, and Riya are sitting on the classroom bench facing towards the blackboard. Mani is sitting between Parth a...
‘A = B’ means ‘A is the father of B‘.
‘A $ B’ means ‘A is the sister of B’.
‘A * B’ means ‘A is the mother of B‘.<...
In a certain code language,
'get ready now' is coded as 'li ah tc',
'ready for vacation' is coded as 'cs li pa',
'travel for work n...
Which number from the options will replace the question mark (?) in the following series?
3, 13, 53, 213,?
Select the option in which the figure given below is embedded. (Rotation of the shape is not allowed)Â
In a certain code language, ‘strong and mighty’ is written as ‘ui yv tk’ and ‘soft yet strong’ is written as ‘hd tk bw’. How is ‘stron...
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