MCQ
At neutral temperature, the thermoelectric power $\left(\frac{\mathrm{dE}}{\mathrm{dT}}\right)$ rias the value
- ✓Zero
- BMaximum but negative
- CMaximum but positive
- DMinimum but positive
✓
Answer
Correct option: A.
Zero
Zero
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
The frequency and work function of an incident photon are $n$ and $\emptyset_0$. If $n_{0}$ is the threshold frequency then necessary condition for the emission of photo electron is
→Two coils X and Y are linked such that emf E is induced in Y when the current in X is changing at the rate $\text{I}\big(=\frac{\text{dI}}{\text{dt}}\big)$. If a current I0 is now made to flow through Y, the flux linked with X will be.
→The mass number of a nucleus is equal to the number of(a) Electrons it contains(b) Protons it contains(c) Neutrons it contains(d) Nucleons it contains
Lenz's law gives(a) The magnitude of the induced e.m.f.(b) The direction of the induced current(c) Both the magnitude and direction of the induced current(d) The magnitude of the induced current
In the adjoining circuit, the e.m.f. of the cell is $2$ volt and the internal resistance is negligible. The resistance of the voltmeter is $80$ ohm. The reading of the voltmeter will be
→Assertion : An electric bulb is first connected to a dc source and then to a ac source having the same brightness in both the cases.
Reason : The peak value of voltage for an $A.C.$ source is $\sqrt{2}$ times the root mean square voltage.
→Reason : The peak value of voltage for an $A.C.$ source is $\sqrt{2}$ times the root mean square voltage.
A source emits light of wavelength 4700Å, 5400 Å and 6500 Å. The light passes through red glass before being tested by a spectrometer. Which wavelength is seen in the spectrum(a) 6500 Å(b) 5400 Å(c) 4700 Å(d) All the above
A photon of wavelength $6630 \mathring A$ is incident on a totally reflecting surface. The momentum delivered by the photon is equal to
→Assertion : In all conductors, for studying the thermoelectric behaviour or metals, lead is taken as a reference metal.
Reason : In lead, the Thomson effect is negative.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : In lead, the Thomson effect is negative.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Which of the following is not true for wire wound resistor?