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प्रश्न
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उत्तर
Two uses of conductors:
(i) Connecting wires are made of conductors like copper.
(ii) Conductors are used as electrolytes in cells
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संबंधित प्रश्न
Compare how an ammeter and a voltmeter are connected in a circuit.
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What is the p.d. across the battery?
State two differences between the e.m.f and terminal voltage of a cell.
Distinguish between an open and a closed circuit.
Define the following:
Electromotive force
Tick (✓) the correct choice among the following :
(a) A strong short bar magnet is dropped into a solenoid connected to a
galvanometer as shown in fig . The galvanometer shows a deflection to the left when the current in the coil as seen from above is counter clockwise. Which one of the following shows the correct deflection of the galvanometer when the magnet is at posi tions A, Band C.
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
