Download App

Magnetism And Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
MCQ
Magnetic field intensity is defined as:
  • A
    Magnetic moment per unit volume.
  • B
    Magnetic induction force acting on a unit magnetic pole.
  • C
    Number of lines of force crossing per unit area.
  • D
    Number of lines of force crossing per unit volume.
✓

Answer

  1. Magnetic induction force acting on a unit magnetic pole.

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 Magnetism And Matter→Magnetism And Matter — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

A free neutron decays to a proton but a free proton does not decay to a neutron. This is because:
  1. Neutron is a composite particle made of a proton and an electron whereas proton is a fundamental particle.
  2. Neutron is an uncharged particle whereas proton is a charged particle.
  3. Neutron has large rest mass than the proton.
  4. Weak forces can operate in a neutron but not in a proton.
→
The work done to move a charge along an equipotential from A to B:
→
A capacitor C1 of capacitance $1\mu\text{F}$ and a capacitor C2 of capacitance $2\mu\text{F}$ are separately charged by a common battery for a long time. The two capacitors are then separately discharged through equal resistors. Both the discharge circuits are connected at t = 0.
  1. The current in each of the two discharging circuits is zero at t = 0.
  2. The currents in  the two discharging circuits at t = 0 are equal but not zero.
  3. The currents in the two discharging circuits at t = 0 are unequal.
  4. C1 loses 50% of its initial charge sooner than C2 loses 50% of its initial charge.
→

Two coherent sources of intensity ratio 1 : 4 produce an interference pattern. The fringe visibility will be

(a) 1

(b) 0.8

(c) 0.4

(d)  0.6
→

A table tennis ball which has been covered with conducting paint is suspended by a silk thread so that it hang between two plates, out of which one is earthed and other is connected to a high voltage generator. This ball

(a) Is attracted towards high voltage plate and stays there

(b) Hangs without moving

(c) Swing backward and forward hitting each plate in turn

(d) Is attracted to earthed plate and stays there
→

The use of study of hysteresis curve for a given material is to estimate the

(a) Voltage loss

(b) Hysteresis loss

(c) Current loss

(d) All of these
→
Magnetic lines of force can pass through:
→

A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.16 Tesla experiences a torque of magnitude 0.032 Joule. The magnetic moment of the bar magnet will be

(a) 0.23 Joule/Tesla

(b) 0.40 Joule/Tesla

(c) 0.80Joule/Tesla

(d) Zero
→
Which group among the following is insulator?
→

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å then

(a) Stopping potential will decrease

(b) Stopping potential will increase

(c) Kinetic energy of emitted electrons will decrease

(d) The value of work function will decrease
→