Download App

Moving Charges and Magnetism — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
A constant current is flowing through a long straight conductor, then the graph showing change in produced magnetic field B with distance r is:
  • A
    Image
  • B
    Image
  • C
    Image
  • ✓
    Image
✓

Answer

Correct option: D.
Image
(d)Image

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 Moving Charges and Magnetism→Moving Charges and Magnetism — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

The wavefronts of a light wave travelling in vacuum are given by x + y + z = c. The angle made by the direction of propagation of light with the X-axis is:
→
Figure shows an imaginary cube of edge $\frac{\text{L}}{2}.$ A uniformly charged rod of length L moves towards left at a small but constant speed u. At t = 0, the left end just touches the centre of the face of the cube opposite it. Which of the graphs shown in figure represents the flux of the electric field through the cube as the rod goes through it?


  1. a
  2. b
  3. c
  4. d
→

A uniform wire of 16 Ω  is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance 16 Ω. The effective resistance between the other two opposite corners is

(a) 32 Ω  

(b) 20 Ω

(c) 8 Ω

(d) 4 Ω
→

When a point source of light is at a distance of one metre from a photo cell, the cut off voltage is found to be V. If the same source is placed at 2 m distance from photo cell, the cut off voltage will be

(a) V 

(b) V/2

(c) V/4    

(d) V/ 
→

A and B are two radioactive substances whose half lives are 1 and 2 years respectively. Initially 10 gm of A and 1 gm of B is taken. The time (approximate) after which they will have same quantity remaining is

(a) 6.62 years

(b) 5 years

(c) 3.2 years

(d) 7 years
→
The electrostatic force between the metal plates of an isolated parallel capacitor C having a charge Q and area A is:
→
A shell is fired from a cannon with a velocity V at an angle $\theta$ with the horizontal direction. At the highest point in its path, it explodes into two pieces of equal masses. One of the pieces retraces its path to the cannon. The speed of the other piece immediately after the explosion is:

  1. $\text{3V}\cos\theta$

  2. $2\text{V}\cos\theta$

  3. $\frac{3}{2}\text{V}\cos\theta$

  4. $\text{V}\cos\theta$

→

In a step-up transformer the turn ratio is 1:10. A resistance of 200 ohm connected across the secondary is drawing a current of 0.5 A. What is the primary voltage and current

(a) 50 V, 1 amp

(b) 10 V, 5 amp

(c) 25 V, 4 amp

(d) 20 V, 2 amp
→
A gas kept in a container of finite conductivity is suddenly compressed. The process:
  1. Must be very nearly adiabatic.
  2. Must be very nearly isothermal.
  3. May be very nearly adiabatic.
  4. May be very nearly isothermal.
→
Rydberg’s constant is:
→