Download App

Moving Charges and Magnetism — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
What is the work done by the magnetic field on the moving charge?
  • A
    No work is done by the magnetic field on the moving charge.
  • B
    Work done will be maximum.
  • C
    Work done will be minimum.
  • D
    Both A and B
✓

Answer

  1. No work is done by the magnetic field on the moving charge.

Explanation:

The magnetic force acts in such a way that the direction of the magnetic force and velocity are always perpendicular to each other. If force and velocity are perpendicular force and displacement are also perpendicular, thus W = FS cos q, if q = 90, work done will be zero.

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

A magnetic dipole is under the influence of two magnetic fields The angle between the field directions is 60° and one of the fields has a magnitude of 1.2 × 10–2T. If the dipole comes to stable equilibrium at an angle of 15° with this field, what is the magnitude of other field?
→
The parallel rays of white light are made an incident normally on an air film of uniform thickness. 250 fringes are seen in the transmitted light between 4000$\mathring{\text{A}}$ and 6500$\mathring{\text{A}}$. Thickness of air film is:
→
In a charged capacitor, the energy resides:
→
In insulators________. (C.B is conduction band and V.B is valence band)
→
Identify the type of materials which develop electric currents in them, when an electric field is applied.
→
A diode, a resistor and a 50Hz AC source are connected in series. The number of current pulses per second through the resistor is:
→
Carbon, silicon and germanium have four valence electrons each. At room temperature the appropriate statement is:
→

The circuit shown in following figure contains two diode D1 and D2 each with a forward resistance of 50 ohms and with infinite backward resistance. If the battery voltage is 6 V, the current through the 100 ohm resistance (in amperes) is

(a) Zero

 (b) 0.02

 (c) 0.03

 (d) 0.036
→

Intrinsic semiconductor is electrically neutral. Extrinsic semiconductor having large number of current carriers would be

(a) Positively charged

(b) Negatively charged

(c) Positively charged or negatively charged depending upon the type of impurity that has been added

(d) Electrically neutral
→
A magnetic field can be produced by :
→