Four identical electrical lamps are labelled 1.5V, 0.5A which describes the condition necessary for them to operate at normal brightness. A 12V battery of negligible internal resistance is connected to lamps as shown, then [UPSEAT 2001]

Total power dissipated in circuit when all lamps are normally bright is 24W

The value of R for normal brightness of each lamp is (3/4) W

The value of R for normal brightness of each lamp is (21/4) W

Power dissipated in R is 21W when all lamps are normally bright

Four identical electrical lamps are labelled 1.5V, 0.5A which describe

1.	Four identical electrical lamps are labelled 1.5V, 0.5A which describes the condition necessary for them to operate at normal brightness. A 12V battery of negligible internal resistance is connected to lamps as shown, then [UPSEAT 2001]
A.	The value of R for normal brightness of each lamp is (3/4) W
B.	The value of R for normal brightness of each lamp is (21/4) W
C.	Total power dissipated in circuit when all lamps are normally bright is 24W
D.	Power dissipated in R is 21W when all lamps are normally bright
Answer» C. Total power dissipated in circuit when all lamps are normally bright is 24W