MCQ
E denotes electric field in a uniform conductor, I corresponding current through it, $v_d$ drift velocity of electrons and P denotes thermal power produced in the conductor, then which of the following graph is incorrect
- ✓
- B
- C
- D
✓
Answer
Correct option: A.
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
Assertion : A double convex lens $(m = 1.5)$ has focal length $10 \ cm.$ When the lens is immersed in water $(m = 4/3)$ its focal length becomes $40 \ cm.$
Reason : $\frac{1}{f}=\frac{\mu_1-\mu_m}{\mu_m}\left(\frac{1}{R_1}-\frac{1}{R_2}\right)$
→Reason : $\frac{1}{f}=\frac{\mu_1-\mu_m}{\mu_m}\left(\frac{1}{R_1}-\frac{1}{R_2}\right)$
Period of revolution increases in the order of (a) Saturn, Uranus, Venus(b) Mars, Saturn, Pluto(c) Mercury, Neptune, Mars(d) Mars, Jupiter, Venus
A conductor with a positive charge (a) Is always at +ve potential(b) Is always at zero potential(c) Is always at negative potential(d) May be at +ve, zero or -ve potential
Select the correct statements. Coulomb’s law correctly describes the electric force that:
i. binds the electrons of an atom to its nucleus.
ii. binds the protons and neutrons in the nucleus of an atom.
iii. binds atoms together to form molecules.
i. binds the electrons of an atom to its nucleus.
ii. binds the protons and neutrons in the nucleus of an atom.
iii. binds atoms together to form molecules.
The inverse square law of intensity $\Big(\text{i.e., the intensity}\propto\frac{1}{\text{r}^2}\Big)$ is valid for a:
→- Point source.
- Line source.
- Plane source.
- Cylindrical source.
Work function of lithium and copper are respectively $2.3\ eV$ and $4.0\ eV$. Which one of the metal will be useful for the photoelectric cell working with visible light ? $(h = 6.6 \times 10^{–34} J-s, c = 3 \times 10^8 m/s)$
→Ten grams of $^{57}Co$ kept in an open container beta$-$decays with a half$-$life of $270$ days. The weight of the material inside the container after $540$ days will be very nearly$:$
→Indicate which one of the following system is digital (a) Pulse position modulation(b) Pulse code modulation(c) Pulse width modulation(d) Pulse amplitude modulation
If a small amount of antimony is added to germanium crystal:
The distance between the plates of a parallel plate condenser is 8mm and P.D. 120 volts. If a 6mm thick slab of dielectric constant 6 is introduced between its plates, then(a) The charge on the condenser will be doubled(b) The charge on the condenser will be reduced to half(c) The P.D. across the condenser will be 320 volts(d) The P.D. across the condenser will be 45 volts