Download App

Moving Charges and Magnetism — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMoving Charges and Magnetism1 Mark
MCQ
The current sensitibility of a moving coil galanometer increases with decrease in:
  • A
    Magnetic field
  • B
    Area of a coil
  • C
    Number of turns
  • D
    None of these
✓

Answer

  1. None of these

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 (1 Marks)" from Moving Charges and Magnetism→Moving Charges and Magnetism — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be:
  1. zero
  2. < 0.1mm
  3. 0.1mm
  4. > 0.1m
→

Four charges are placed on corners of a square as shown in figure having side of 5cm. If Q is one microcoulomb, then electric field intensity at centre will be

(a) 1.02  upwards

(b) 2.04  downwards

(c) 2.04  upwards

(d) 1.02  downwards
→

When a current is passed through water, acidified with a dilute sulphuric acid, the gases formed at the platinum electrodes are

(a) 1 vol. hydrogen (cathode) and 2 vol. oxygen (anode)

(b) 2 vol. hydrogen (cathode) and 1 vol. oxygen (anode)

(c) 1 vol. hydrogen (cathode) and 1 vol. oxygen (anode)

(d) 1 vol. oxygen (cathode) and 2 vol. hydrogen (anode)
→

Consider an electron (m = 9.1   confined by electrical forces to move between two rigid walls separated by 1.0  metre, which is about five atomic diameters. The quantised energy value for the lowest stationary state is

(a) 12  

(b) 6.0  

(c) 6.0  

(d) 6 Joule
→
A body having its centre of mass at the origin has three of its particles at (a, 0, 0), (0, a, 0), (0, 0, a). The moments of inertia of the body about the X and Y axes are 0.20kg-m2 each. The moment of inertia about the Z-axis:
  1. Is 0.20kg-m2
  2. Is 0.40kg-m2
  3. Is $0.20\sqrt2\text{kg-m}^2$
  4. Cannot be deduced with this information.
→

An alternating current of frequency 200 rad/sec and peak value 1A as shown in the figure, is applied to the primary of a transformer. If the coefficient of mutual induction between the primary and the secondary is 1.5 H, the voltage induced in the secondary will be

(a) 300 V

(b) 191 V

(c) 220 V 

(d) 471 V
→
Complete the following nuclear reaction. \[{ }_0^1 n+{ }_{92}^{235} U-{ }_{92}^{236} U---+{ }_{41}^{99} Nb+--\]
→

An electron is moving in electric field and magnetic field it will gain energy from

(a) Electric field

(b) Magnetic field

(c) Both of these

(d) None of these

→
SI unit of the magnetic field is _________.
→

Assertion  :   A circular loop carrying current lies in XY plane with its center at origin having a magnetic flux in negative Z-axis.

Reason      : Magnetic flux direction is independent of the direction of current in the conductor.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.
→