KEELEKTROMAGNETAN

Diagram shows a transformer used to light up a bulb of 6 V, 12 W at normal brightness. If the number of turns on the primary coils is 1000 turns, what is the number of turns on the secondary coil ?

Diagram shows an electric motor. Which graph shows the output voltage against time when the coil rotates?

Diagram shows a left hand which represents the Fleming’s Left-Hand Rule. What does X represents of ?

Diagram 23 shows a copper rod cut magnetic flux. Which of the following pair is correct to show the direction of induced current and direction of deflection of pointer in galvanometer?

Diagram shows a bar magnet moved towards a solenoid. Which of this action will increase the deflection of galvanometer pointer?

Diagram shows a current carrying conductor in a magnetic field. What will happen to the coil?

The function of a transformer in an electrical energy transmission system is to

What is the function of the laminated iron core in a transformer?

Diagram shows a current carrying conductor is placed in a magnetic field. Which of the following A, B, C and D shows the direction of force acting on the conductor?