1.
Magnetic lines of force determine
2.
The magnetic field near a long straight wire a described by
3.
Magnetic field produced at the centre of a current carrying circular wire is
4.
The front face of a circular loop of a wire is the North pole, the direction of current in this face of the loop will be
5.
Which of the following properties of a proton can change while it moves freely in a magnetic field?
6.
An alpha particle projected towards west is deflected towards north by a magnetic field. The direction of the magnetic field is
7.
Potential difference between a live and a neutral wire is
8.
Magnitude of magnetic field intensity at a point around a current carrying conductor is B. if the strength of current in the conductor becomes double, then the magnitude of the magnetic field intensity at the point around the conductor is
9.
Parallel conductor carrying current in the same directions
10.
Two parallel conductors carrying current in the opposite directions
11.
Magnetic field inside a long solenoid carrying current is
12.
What should be the core of an electro magnet?
13.
Who has stated the right hand thumb rule?
14.
Alnico is an alloy which is made up of
15.
At the time of short- circuit the current in the circuit
16.
In all the electrical appliances, the switches are put in the
17.
Fuse in an electric -circuit acts as a
18.
The frequency of direct current is
19.
Which of the following is not attracted by a magnet?
20.
A plotting compass is placed near the south pole of a bar magnet. The pointer of the plotting compass will
21.
Frequency of AC in India is
22.
Which of the following is the property of a magnetic field?
23.
Which of the following is the SI unit of magnetic field?
24.
When a current carrying conductor is placed in a magnetic field, what is the force experienced by the conductor?
25.
Which of the following is the direction of the force experienced by a current carrying coil placed in a magnetic field?
26.
An alpha particle is diverted towards west is deflected towards north by a field. The field is magnetic. What will be the direction of field?
27.
No force acts on a current carrying conductor when it is placed
28.
A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside a solenoid
29.
Which of the following is the device that converts electrical energy into mechanical energy into mechanical energy
30.
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic field line of force will be
