Which of the following electronic devices is used for digital displays in electronic calculators?
Answer : C. LCDs
Given below are two statements, an Assertion (A) and Reason(R ).
Assertion (A) : Transformer is useful for stepping up or stepping down voltages.
Reason(R ): Transformer is a device used in D.C. circuits.
Answer : C. A is true, but R is false
Pure silicon is used in
Answer : A. Electronics industry
Answer : D. converts radio waves into electrical signals and vice versa
Analyse the statements and choose the correct answer:
Assertion (A): A particle moves along a circle.
Resertion (R-I ): speed is uniform.
(R-II ): Velocity is changing
Answer : D. Both are correct
A fuse is used in mains electric supply as a safety device.
Which one of the following statements about the fuse is correct?
Answer : C. It must have a low melting point