Question
When a potential difference is applied across, the current passing through
| (a) An insulator at 0 K is zero |
| (b) A semiconductor at 0 K is zero |
|
(c) A P-N diode at 300 K is finite, if it is reverse biased |
| (d) a, b, c |
✓
Answer
(d) a, b, c
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
If two conducting spheres are separately charged and then brought in contact
|
(a) The total energy of the two spheres is conserved |
|
(b) The total charge on the two spheres is conserved |
|
(c) Both the total energy and charge are conserved |
|
(d) The final potential is always the mean of the original potentials of the two spheres |
If a spark is produced on removing the load from an AC circuit then the element connected in the circuit is.
A conductor in the form of a right angle ABC with AB = 3 cm and BC = 4 cm carries a current of 10 A. There is a uniform magnetic field of 5 T perpendicular to the plane of the conductor. The force on the conductor will be
|
(a) 1.5 N |
(b) 2.0 N |
(c) 2.5 N |
(d) 3.5 N |
A glass slab of thickness 3 cm and refractive index 3/2 is placed on ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be
|
(a) 3.0 cm |
(b) 4.0 cm |
(c) 4.5 cm |
(d) 5.0 cm |
State which of the following is correct
|
(a) Joule = coulomb × volt |
(b) Joule = coulomb/volt |
|
(c) Joule = volt × ampere |
(d) Joule = volt/ampere |
From the following, what charges can be present on oil drops in Millikan's experiment (Here e is the electronic charge)
|
(a) Zero, equal to the magnitude of charge on α - particle |
|
(b) 2e, 1.6 |
|
(c) 1.6 |
|
(d) 1.5 e, e |
The logic behind ‘NOR’ gate is that it gives
|
(a) High output when both the inputs are low |
|
(b) Low output when both the inputs are low |
|
(c) High output when both the inputs are high |
|
(d) None of these |
Both the strings, shown in figure are made of same material and have same cross-section. The pulleys are light. The wave speed of a transverse wave in the string AB is $\nu_1$ and in CD it is $\nu_2.$ Then $\frac{\nu_1}{\nu_2}$ is:
→-
$1$
-
$2$
-
$\sqrt{2}$
-
$\frac{1}{\sqrt{2}}.$
A free electron is placed in the path of a plane electromagnetic wave. The electron will start moving:
Which of the following is not a unit of magnetic induction?