CHAPTER ELECTROMAGNETISM AND CIRCULAR MOTION

1. The direction of magnetic field for the solenoid is along:

 
 
 
 

2. The angular analogue of linear displacement is called

 
 
 
 

3. in case of planets the necessary acceleration is provided by

 
 
 
 

4. A point on the rim of a wheel 4 m in diameter has a velocity of 1600 cm s-1. The
angular velocity of the wheel is.

 
 
 
 

5. Magnetic field due to current carrying straight wire varies as

 
 
 
 

6. The magnetic field due to the electric current in a conducting wire is:

 
 
 
 

7. The angular velocity of the minute hand of a clock is

 
 
 
 

8. A car of 1000kg traveling at 20m/sec rounds a curve of radius 100m. find the necessary centripetal force

 
 
 
 

9. The strength of the magnetic field outside a solenoid is weak because

 
 
 
 

10. If a car moves with a uniform speed of 2 msl in a circle of radius 0.4 m. It’s angular speed is

 
 
 
 

11. If a body is moving in a circular path with constant speed, then the

 
 
 
 

12. A charged particle moves through a magnetic field in a direction perpendicular to it. Which of the following remain unchanged for the particle?

 
 
 
 

13. which of the following cannot be deflected by magnetic field

 
 
 
 

14. One geostationary satellite covers

 
 
 
 

15. The direction of angular velocity is along

 
 
 
 

16. Ten seconds after an electric fan is turned on, the fan rotates at 300rev/min. Its
average angular acceleration is

 
 
 
 

17. If the distance between the earth and the sun is reducing to one fourth, then the
number of days in one year approximately

 
 
 
 

18. The earth (muss=6×10^24 kg) revolves around the sun with an angular velocity of
2×10-7 rad/s in a circular path of radius 1.5x 10^8 km. The force exerted by the sun on
earth is

 
 
 
 

19. The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle
turned through in 1 sec in radian is

 
 
 
 

20. The magnitude of force on a moving charge is zero then angle between the velocity of the charge carrier and magnetic field is

 
 
 
 

21. The particle is moving in a circle of radius r with constant angular speed W. Its acceleration, directed towards the center of the circle is

 
 
 
 

22. Two parallel wires carrying currents in the opposite directions

 
 
 
 

23. The direction of the magnetic lines of force can be found by using:

 
 
 
 

24. The time period of revolution of geostationary satellite is

 
 
 
 

25. A strong magnetic field is applied to a stationary clectron, then

 
 
 
 

26. The magnetic field of a solenoid is quite similar to that of a:

 
 
 
 

27. The linear and angular velocities of a particle moving about the centre of a circle of
radius r, are related by

 
 
 
 

28. A flywheel gains a speed of 540 rpm in 6 second. Its angular acceleration is

 
 
 
 

29. The magnetic field produced due to the

 
 
 
 

30. The direction of the magnetic lines of force depends upon:

 
 
 
 

31. The force which provides the necessary centripetal force to keep the mud in circular
path is called

 
 
 
 

32. Angular speed of second’s hand of a watch in rad/s is

 
 
 
 

33. When a particle moves in a circle, the angle between it linear velocity and the
angular velocity is always

 
 
 
 

34. The direction at a point on the magnetic lines of force can be taken along:

 
 
 
 

35. A positively charged particle moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will

 
 
 
 

Question 1 of 35

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