Q. 124.3( 7 Votes )
Fill in the following blank with a suitable word :
Ohm's law states a relation between potential difference and ........................
Ohm's law states a relation between potential difference and current.
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The diagram shows a cell connected in series with an ammeter and three resistors (10 Ω, 20Ω, 30Ω). The circuit can be completed by a movable constant M. When M is connected to x, then ammeter reads 0.6 A. what is the ammeter reading when M is connected to y?
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What kind of graph is obtained by plotting values of V and I? Why?All In One Science
A wire is cut into three equal parts and then connected in parallel with the same source. How will its.
(i) resistance and resistivity gets affected?
(ii) How would the total current and the current through the parts change?All In One Science
Find the current drawn from the battery by network of four resistors shown in the figure?
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The potential difference between the terminals of an electric heater is 60V when it draws a current of 4A from the source. Find the resistance of heater when in use.Together With Science
In the given circuit, connect a nichrome wire of length ‘L’ between points X and Y and note the ammeter reading.
(i) When this experiment is repeated by inserting another nichrome wire of the same thickness but twice the length (2L), what changes are observed in the ammeter reading?
(ii) State the changes that are observed in the ammeter reading if we double the area of cross-section without changing the length in the above experiment. Justify your answer in both the cases.Together With Science
When a high resistance voltmeter is connected directly across a resister its reading is 2 V. An electric cell is sending the current of 0.4A, (measured by an ammeter) in the electric circuit in which a rheostat is also connected to vary the current.
Find the resistance of the resister.Together With Science