Download App

Heating and Chemical Effect of Current — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsHeating and Chemical Effect of Current1 Mark
Question

When current is passed in antimony-bismuth couple, then

(a) The junction becomes hot when the current is from bismuth to antimony

(b) The junction becomes hot when current flows from antimony to bismuth

(c) Both junctions become hot

(d) Both junctions become cold
✓

Answer

(b) The junction becomes hot when current flows from antimony to bismuth

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 Heating and Chemical Effect of Current→Heating and Chemical Effect of Current — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

A certain amount of current when flowing in a properly set tangent galvanometer, produces a deflection of 45°. If the current be reduced by a factor of , the deflection would

(a) Decrease by 30°

 (b) Decrease by 15°

 (c) Increase by 15°

 (d) Increase by 30°
→
Which one of the following properties is not found in cathode rays?
→

Three equal resistances each of value R are joined as shown in the figure. The equivalent resistance between M and N is

(a) R

(b) 2R

(c)  

(d)  
→
A system can be taken from the initial state p1, V1 to the final state p2, V2 by two different methods. Let $\Delta\text{Q}$ and $\Delta\text{W}$ represent the heat given to the system and the work done by the system. Which of the following must be the same in both the methods?
  1. $\Delta\text{Q}$
  2. $\Delta\text{W}$
  3. $\Delta\text{Q}+\Delta\text{W}$
  4. $\Delta\text{Q}-\Delta\text{W}$
→

The potential difference between points  A and  B of adjoining figure is

(a)  

 (b)  

(c)  

(d) 2 V
→

The focal length of objective and eye lens of a microscope are 4 cm and 8 cm respectively. If the least distance of distinct vision is 24 cm and object distance is 4.5 cm from the objective lens, then the magnifying power of the microscope will be

(a) 18

(b) 32 

(c) 64 

(d) 20  
→

Two condensers of capacities 1μF  and 2 μF  are connected in series and the system is charged to 120 volts. Then the P.D. on 1 μF  capacitor (in volts) will be

(a) 40  

(b) 60

(c) 80 

(d) 120
→
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.

→
How many electrons will there be in one coulomb of charge?
→

A particle of mass m and charge q is placed at rest in a uniform electric field E and then released. The kinetic energy attained by the particle after moving a distance y  is

(a)  

(b)  

(c) qEy

(d )  
→