Question
A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account, indicate which of the plots shown in figure best represents the rate of production of thermal energy in the resistor.
✓
Answer
Explanation:
$\text{U}_{\text{AB}}=\text{a}_{\text{AB}}\theta+\frac{1}{2}\text{b}_{\text{AB}}\theta^2$
$\text{q}\times\text{t}$
$\text{dq}\times\text{dt}$
$Þ \ \frac{\text{du}_{\text{AB}}}{\text{du}}\propto\text{a}_{\text{AB}+\text{b}_{\text{AB}}}\text{t}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What is the effect on the acceleration of a particle if the net force on the particle is doubled?
Why can an engine working under isothermal conditions produce no useful work?
What are the two conditions when a real gas follow the ideal gas equation PV = nRT?
A coolie with load on his head is walking on a horizontal plateform. What is work done against gravity?
A tank with a square base of area 1.0m2 is divided by a vertical partition in the middle. The bottom of the partition has a small-hinged door of area 20cm2. The tank is filled with water in one compartment, and an acid (of relative density 1.7) in the other, both to a height of 4.0m. compute the force necessary to keep the door close.
There is a hole in a metal disc. If a metal disc is heated, what will happen to the size of the hole?
What is the basic unit of quantity of substance?
A ball is fired at a vertical hill at a distance $x$ from a cannon aimed at an angle $\theta$ above the horizontal on plane with a nozzle speed $v$. At what height $y$ of the hill from the bottom will the sphere hit?
→A sphere can roll on a surface inclined at an angle $\theta$ if the friction coefficient is more than $\frac{2}{7}\text{g}\sin\theta$ Suppose the friction coefficient is $\frac{1}{2}\text{g}\sin\theta$ and a sphere is released from rest on the incline,
→- It will stay at rest.
- It will translate and rotate about the centre.
- It will make pure translational motion.
- The angular momentum of the sphere about its centre will remain constant.
Give one similarity and one difference between a S.H.M. and a Wave.