Q1 . The face of the loop, in which the current appears to flow anticlockwise, acts as:
- (a) Magnetic North Pole
- (b) Magnetic South Pole
- (c) Half circle North and half circle South
- (d) None of these
- (a) Magnetic North Pole
Q2. Shunt resistance is
- (a) a small resistance connected in parallel with a galvanometer or a ammeter to protect it from strong currents
- (b) a high resistance used in series with a galvanometer to increase the potential difference
- (c) a very small resistance to be used in series with the galvanometer
- (d) a very high resistance to be used in parallel with the galvanometer .
- (a) a small resistance connected in parallel with a galvanometer or a ammeter to protect it from strong currents
Q3. One Tesla is equal to
- (a) `10^{7}` Gauss
- (b) `10^{-4}` Gauss
- (c) `10^{4}` Gauss
- (d) `10^{8}` Gauss
- (c) `10^{4}` Gauss
Q4. The magnetic field due to Infinitely long current carrying conductor at a distance r from conductor depends upon distance r as
- (a) B ∝ r
- (b) B ∝ 1/r
- (c) B ∝`r^{2}`
- (d) B ∝ 1/`r^{2}`
- (b) B ∝ 1/r
Q5. The dimensions of magnetic field are
- (a) M`L^{2}` `T^{-2}`
- (b) M`L^{2}` `T^{-2}``A^{-1}`
- (c) M`L^{0}` `T^{-2}``A^{-1}`
- (d) None of these
- (c) M`L^{0}` `T^{-2}``A^{-1}`
Q6. For a point on the axis of a circular coil carrying current, magnetic field at the centre of the coil is
- (a) Minimum but non zero
- (b) zero
- (c) Maximum
- (d) Can’t be determined
- (c) Maximum
Q7.Ampere’s circuital law is
- (a) ∮ ๐ฉ. ๐ ๐ = ๐๐ I
- (b) ∮ ๐ต. ๐๐ = I / ๐๐
- (c) ∮ ๐ต⃗ . ๐๐ = ๐0. I
- (d) ∮ ๐ต⃗ . ๐๐ ⃗⃗⃗ = I / ๐0
- (a) ∮ ๐ฉ. ๐ ๐ = ๐๐ I
Q8. S.I. unit of magnetic pole strength is:
- (a) Am
- (b) A`m^{-1}`
- (c) A`m^{-2}`
- (d) A`m^{2}`
- (a) Am
Q9. The pole strength of a bar magnet when it is cut into two equal pieces transverse to its length becomes/remains:
- (a) Half
- (b) Double
- (c) Same
- (d) None of these
- (c) Same
Q10. The material of permanent magnet has
- (a) High retentivity, low coercivity
- (b) Low retentivity, High coercivity
- (c) High retentivity, High coercivity
- (d) Low retentivity, Low coercivity
- (c) High retentivity, High coercivity
Q11 . An electron is moving along X-axis in a magnetic field along Y-axis .The direction of magnetic force initially on it will be along
- (a) - Z-axis
- (b) + Y-axis
- (c) + Z-axis
- (d) any of the above
- (a) - Z-axis
Q12. A charged particle enters a magnetic field at an angle of 90° with the magnetic field .The path of the particle will be an
- (a) helix
- (b) ellipse
- (c) circle
- (d) straight line
- (c) circle
Q13. How is galvanometer converted into an voltmeter?
- (a) by connecting high resistance in parallel to the galvanometer
- (b) by connecting a low resistance in parallel to the galvanometer
- (c) by connecting a high resistance in series with the galvanometer
- (d) by connecting a low resistance in series with the galvanometer
- (c) by connecting a high resistance in series with the galvanometer
Q14. The angular frequency of a cyclotron is independent of
- (a) speed
- (b) mass
- (c) magnetic field
- (d) charge
- (a) speed
Q15. When the plane of a current carrying coil lies perpendicular to the direction of external magnetic field then torque acting on the coil is
- (a) maximum because the magnetic field is radial
- (b) minimum but non zero
- (c) zero
- (d) dependent on the amount of current through it
- (c) zero
MODEL/GUESS PAPER : 10+2 BIOLOGY MODEL QUESTION PAPER( WITH ANSWER)
GK OF TODAY
For all competition read important general knowledge questions
Q16.The force between two parallel current carrying conductors is F. If the current in each conductor is doubled, then the force between them becomes;
- (a) 4F
- (b) 2F
- (c) F
- (d) 0
- (a) 4F
Q17. A proton enters a uniform magnetic field of 5 T at right angle to the field with a speed of 4 × 107m`s^{-1}`. What is the magnetic force acting on the proton?Given that charge on the proton = 1.6 × 10-19 C
- (a) 3.2 ×`10^{-13}` N
- (b) 2.3 × `10^{-13}` N
- (c) 3.0 x `10^{-11}` N
- (d) 3.2 x `10^{-11}` N
- (d) 3.2 x `10^{-11}` N
Q18. A solenoid of length 0.5m has radius of 1cm and is made up of 500 turns. It carries a current of 5A. What is the magnitude of magnetic field inside the solenoid?
- (a) 1.57 × `10^{-3}`T
- (b) 3.14 ×`10^{-3}`T
- (c) 4.71 × `10^{-3}`T
- (d) 6.28 × `10^{-3}`T
- (d) 6.28 × `10^{-3}`T
Q19. In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 0.26 G and the dip angle is 60o. What is the magnetic field of the earthat this location?
- (a) 0.52 G
- (b) 0.39 G
- (c) 0.26 G
- (d) 0.13 G
- (a) 0.52 G
Q20. A solenoid has number of turns per meter n = 1000 turns `m^{-1}` and carries a current of 2 A. The magnetic intensity or magnetising intensity H of the solenoid is given by
- (a) 2000 A/m
- (b) 2 × `10^{-3}` A/m
- (c) 500 A/m
- (d) 250 A/m
- (a) 2000 A/m
Q21. T20 WORLD CUP 2021 เจตਿੱเจ เจਿเจธ เจਿเจกਾเจฐੀ เจจੂੰ เจชเจฒੇเจ เจฐ เจเจซ เจੂเจฐเจจਾเจฎੈਂเจ เจ เจตਾเจฐเจก เจจਾเจฒ เจจਿเจตਾเจਿเจ เจਿเจ।
- (a) MICHAEL MARSH
- (b) DAVID WARNER
- (c) Adam Zampa
- (d) None of these
- (b) DAVID WARNER
