A resistance less ring has 2 bulbs A and B rated at 2V, 19 W and 2V, 2 – McqOptions

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1.	A resistance less ring has 2 bulbs A and B rated at 2V, 19 W and 2V, 29 W respectively. The ring encloses an ideal solenoid whose magnetic field is as shown. The radius of solenoid is 1 m and the number of turns/length =1000/m. The current changes at rate of 9 A/sec Find the value of P if power dissipated in bulb B is \[180{}^\circ \] watt.
A.	4
B.	6
C.	8
D.	11
Answer» B. 6

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