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
A heavy point mass tied to the end of string is whirled in a horizontal circle of radius 20cm with a constant angular speed. What is angular speed if the centripetal acceleration is $980cm/ s^{-2}$?
→The mass of two bodies are doubled and the distance is halved, how will the gravitational force change?
A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?
What is the number of degree of freedom of a bee flying in a room?
Why is there a fear of human blood vessels bursting when going too high in the atmosphere?
A rectangular brick is kept on a table with a part of its length projecting out. It remains at rest if the length projected is slightly less than half the total length but it falls down if the length projected is slightly more than half the total length. Give reason.
Which of the following examples represent periodic motion? A swimmer completing one (return) trip from one bank of a river to the other and back.
A body at higher temperature contains more heat. Comment.
If the line of action of the force is passing through the same point relative to which its moment is to be determined then what will be the value of the moment of force?
In the given progressive wave $\text{y}=5\sin(100\pi\text{t+0.4x})$ where y and x are in m, t is in s. What is the:
Amplitude
→Amplitude