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.
Both A and R are true, and R is the correct explanation of A
Both A and R are true, but R is not the correct explanation of A
A is true, but R is false
A is false but R is true
C. A is true, but R is false
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
R-I is correct, R-II is wrong
R-I is wrong R-II is correct
R-I and R-II are wrong
Both are correct
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?
It is connected in parallel with the main switch
It is made mainly from silver alloys
It must have a low melting point
It must have a very low resistance
C. It must have a low melting point