Electromagnetism-NFE

In a step-down transformer, the number of turns in the secondary coil is

 
 
 
 

The SI unit of magnetic flux is

 
 
 
 

The basic principle behind the working of a generator is

 
 
 
 

What happens when a current-carrying conductor is placed in a magnetic field perpendicular to the current

 
 
 
 

The function of a split ring in a DC motor is to

 
 
 
 

A current is flowing through a straight wire. The direction of the magnetic field around it can be found using

 
 
 
 

A magnetic field can be produced by

 
 
 
 

If the current in a solenoid is increased, the strength of the magnetic field

 
 
 
 

Which of the following devices works on the principle of electromagnetic induction

 
 
 
 

The strength of the magnetic field around a straight current-carrying conductor depends on

 
 
 
 

Question 1 of 10

Related Questions:

  1. Physics 10 MCQ
  2. Simple harmonic motion and waves
  3. Simple harmonic motion and waves-NFE
  4. Give an example of vibratory motion which is not simple harmonic motion. Give a reason for your selection.
  5. At the extreme position, velocity is zero but acceleration is maximum in simple harmonic motion. How can you theoretically explain it?
  6. What will happen to the acceleration of a mass-spring system if its mass is doubled?
  7. A simple pendulum has a time period “T”. What will happen to its time period if its thread length is shortened to half?
  8. A simple pendulum has a time period of 4 seconds. Will its time period remain the same or change if its steel bob is replaced by a wooden bob of the same size?
  9. Same masses are attached to different springs, one is vibrating faster. Why?
  10. A simple pendulum has a time period “T” in Murree. In Karachi, it has a different time period. What would you do to make its time period the same as it was in Murree?
  11. What will happen to the frequency of waves in a ripple tank if the time period of the electrical vibrator is decreased? What will happen to the wave speed?
  12. Why do water waves refract at the boundary of shallow water and deep water in a ripple tank experiment?
  13. Under what conditions are waves diffracted the most?
  14. What do you mean by oscillation? Define simple harmonic motion. What are the conditions for a body to perform SHM? Give examples of bodies that perform SHM.
  15. Show that a vibrating mass-spring system performs simple harmonic motion. What is its time period? On what factors does it depend?
  16. Explain the following terms for SHM: Vibration, amplitude, time period, frequency.
  17. Explain that a steel ball dropped from the edge of a shining bowl performs SHM.
  18. What is a simple pendulum? Show that a vibrating simple pendulum performs SHM. What is the formula for the time period of a simple pendulum? On what factors does it depend?
  19. Explain the process of damping. Differentiate between damped and undamped oscillations.
  20. Define the term wave. Explain it with the help of an example. Differentiate between mechanical waves and electromagnetic waves.