Question

A wire is 20cm long if cut into four equal pieces the resistance of one piece
A۔increase
B۔decrease
2.Terminal potential difference=EMF when
A۔r=R
B۔R greater than r
C۔r=0
D۔r=infinity
E.None
3.A mass spring system vibrating with amplitude 10cm K.E and P.E at equilibrium position when spring constant is 20Nm-1
A=1000J,1000J
B=500J,1000J
C=0J,1000J
D=1000J,0J
E=None​

Answer 1

Answer:

option B

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Answer 2

Answer:

OPTION B

OPTION B

OPTION B

OPTION B