Download App

Current Electricity — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
Question

When a potential difference is applied across the ends of a linear metallic conductor

(a) The free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor

(b) The free electrons are accelerated continuously from the higher potential end to the lower potential end of the conductor

(c) The free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor

(d) The free electrons are set in motion from their position of rest
✓

Answer

(c) The free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Current Electricity→Current Electricity — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

A proton and an electron are accelerated by the same potential difference. Let $\lambda_\text{e}$ and $\lambda_\text{p}$ denote the de Broglie wavelengths of the electron and the proton respectively.

  1. $\lambda_\text{e}=\lambda_\text{p}.$

  2. $\lambda_\text{e}<\lambda_\text{p}.$

  3. $\lambda _\text{e}>\lambda_\text{p}.$

  4. The relation between $\lambda_\text{e}$, and $\lambda_\text{p}$ depends on the accelerating potential difference.

→

For germanium crystal, the forbidden energy gap in joules is

(a) 1.12  

(b) 1.76  

(c)  1.6  

(d) Zero
→
To convert a moving coil galvanometer into voltmeter
→
Nuclear force is :
→
Electric current produced by a moving straight wire in a magnetic field is?
→
Two periodic waves of amplitudes A1 and A2 pass through a region. If A1 > A2, the difference in the maximum and minimum resultant amplitude possible is:
  1. 2A1
  2. 2A2
  3. A1 + A2
  4. A1 - A2
→
Two wires A and B are made of same material. The wore A has a length l and diameter r while the wire B has a length 2l and diameter $\frac{\text{r}}{2}$. If the two wires are stretched by the same force, the elongation in A divided by the elongation in 8 is:

  1. $\frac{1}{8}$

  2. $\frac{1}{4}$

  3. $4$

  4. $8$

→

The count rate of 10g of radioactive material was measured at different times and this has been shown in the figure. The half life of material and the total counts (approximately) in the first half life period, respectively are

(a) 4h, 9000

(b) 3h, 14000

(c) 3h, 235

(d) 3h, 50
→

The temperature coefficient of resistance of a conductor is

(a) Positive always

(b) Negative always

(c) Zero  

(d) Infinite
→
Carbon, silicon and germanium have four valence electrons each. At room temperature the appropriate statement is:
→