Question

please solve this question i will give exta points for this question

Answer 1

1. Calorific value of a fuel is the quantity of heat produced by its combustion.
S.I. unit is J/kg (joule/kilogram)

4. If magnetic field lines intersect with each other, then a tangent cannot be drawn, which means the magnetic line will have two directions which is not possible.

5. Power = Voltage × Current
= 220 × 5 = 1100 W
Maximum no. of bulbs = 1100/90
= 12.22 ≈ 12 bulbs

6. When current is passed through a solenoid, it emits magnetic field lines like in a bar magnet(from negative to positive). So a solenoid has both north and south poles. Therefore a solenoid behaves as a magnet.

Yes. We can determine the poles of a solenoid using a bar magnet. The law is called Lenz law. The rule is End Law.

-WonderGirl

Answer 2

Hello everyone...

the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram

Hope this helps you...