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प्रश्न
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उत्तर
The potential difference between two points may be defined as the work done in moving a unit positive charge from one point to the other.
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संबंधित प्रश्न
Name two gases which are filled in filament type electric light bulbs.
A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is:
(i) Pushed into the coil with its north pole entering first?
(ii) Held at rest inside the coil?
(iii) Pulled out again?
The diagram shows a coil connected to a center zero galvanometerG . The galvanometer shows a deflect ion to the right when the north pole N of a powerful magnet is moved to the right as shown .
(i) Explain, why the defelct ion occurs in the galvanometer.
(ii ) State whether th e current in the coil is cl ockwise or anticl ockwise
when viewed from the end P.
(iii ) State th e observation in G when the coil is moved away from north
pole N of the magnet keeping the magnet stationary.
(iv)State the observation in G when both the coil and the magnet are
moved to right at th e same speed .
Name two common material used for heating elements.
The electric bulbs used these days have a coil-coiled filament. State its reason.
An electric bulb is marked 100 W, 230 V. What does this mean?
What is the order of current drawn by appliances connected to the ‘power circuit’ of a household?
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
What is the commercial unit of electrical energy?
