Physics
Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 V.
Related Questions
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more, same or less when the bulb is not glowing.
In an experiment of verification of Ohm's law, following observations are obtained.
Potential difference V (in volt) 0.5 1.0 1.5 2.0 2.5 Current I (in amp) 0.2 0.4 0.6 0.8 1.0 Draw a V-I graph and use this graph to find —
(a) the potential difference V when the current I is 0.5 A.
(b) the current I when the potential difference V is 0.75 V.
(c) the resistance in circuit.
Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare (i) their resistances (ii) their specific resistance.