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An electric kettle has a resistance of30?. What current will ?ow when it is connected to a 240V supply?
Find also the power rating of the kettle
A current of 5A ?ows in the winding of an electric motor, the resistance of the winding being 100?.
verfiy (a) the p.d. across the winding, and
(b) the power dissipated by the coil
Q. Find the effectual resistance between A and B. 1/R p = 1/R 1 + 1/R 2 R p = R 1 R 2 / (R 1 + R 2 ) = 15 X15 / 30 = 7.5 ohm
The temperature co-efficient of resistance: The temperature co-efficient of resistance is defined as; The Fractional change in resistance from 0ºC, per degree temp
Collision
Three impedances are connected in series across a 100V, 2kHz supply. The impedances comprise: (i) An inductance of 0.45mH and 2 resistance, (ii) An inductance of 570µH a
Red light (λ = 685 nm) falls on a slit that is 0.025 mm wide. The distance between the centers of the central bright band and the second-order dark band is 6.3 cm. What is
the two point charges +10 nano coulomb and -20 nano coulomb are seperated by a distance 0.1m. calculate the neutral poiint along the line joining two charges.
When a small size magnet is laid in two uniform magnetic fields and which are at right angles to each other, the magnet comes to rest at an angle Φ with respect to B h like that
If and show that they constitute a possible electromagnetic field.
What is the fractional change in the resistance of an iron filament when its temperature changes from 25.0°C to 50.0°C?
give a example
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