Assertion : The electric bulbs glows immediately when switch is on.
Reason : The drift velocity of electrons in a metallic wire is very high.
AIIMS 2009, Easy
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1There is a current of $20$ amperes in a copper wire of ${10^{ - 6}}$ square meter area of cross-section. If the number of free electrons per cubic meter is ${10^{29}}$, then the drift velocity isView Solution
- 2A potentiometer wire has length $4\,\, m$ and resistance $8\,\,\Omega $. The resistance that must be connected in series with the wire and an accumulator of e.m.f. $2\,\, V,$ so as to get a potential gradient $1\,\, m \,V$ per $cm$ on the wire is ............. $\Omega$View Solution
- 3View SolutionWhen a potential difference is applied across the ends of a linear metallic conductor
- 4If power in $3\,\Omega $ is $27\,W$ then what is the power in $2\,\Omega $ ................ $\mathrm{W}$View Solution
- 5Calculate the current shown by the ammeter $A$ in the circuit diagram is .............. $A$View Solution
- 6Two resistance wires on joining in parallel the resultant resistance is $\frac{6}{5}\,ohms$. One of the wire breaks, the effective resistance is $2\,ohms$. The resistance of the broken wire is ............ $ohm$View Solution
- 7If three resistors of resistance $2 \,\Omega$, $4 \,\Omega$ and $5 \,\Omega$ are connected in parallel then the total resistance of the combination will beView Solution
- 8Following figure shows cross-sections through three long conductors of the same length and material, with square cross-section of edge lengths as shown. Conductor $B$ will fit snugly within conductor $A$, and conductor $C$ will fit snugly within conductor $B$. Relationship between their end to end resistance isView Solution
- 9For what value of $R$ the net resistance of the circuit will be $18\, ohms$ ............... $\Omega$View Solution
- 10Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer. The value of the unknown resistor $R$ is ............. $\Omega$View Solution
