Which of the following is used to measure the current in a circuit?
Galvanometer
Ammeter
Voltmeter
Rheostat
Name the law which helped you to find the direction of the magnetic field lines:
Lenz’s law
Fleming’s right hand rule
Fleming’s left hand rule
Maxwell’s screw law
A d.c motor converts
Electrical energy into mechanical energy
Mechanical energy into electrical energy
Electrical energy into heat energy
Mechanical energy into heat energy
Which of the following is used to increase or decrease the amplitude of alternating current?
Transformer
Generator
Electromagnets
A device is used to transform 12 V d.c. to 200 V a.c.What is the name of the device?
Step-up transformer
Step-down transformer
Moving coil galvanometer
Which of the following is most commonly used galvanometer?
Pivoted type galvanometer
Suspended type galvanometer
All the above
Which of the following galvanometer has very high sensitivity?
All the above.
Direction of induced current is given by
Newton’s law
Which of the following gives the presence and direction of flow of current in any circuit?
Which of the following converts mechanical energy to electrical energy?
Electric bell
Electric heater
Electric iron