The area around a magnet, in which its influence (force of attraction or repulsion) can be felt, is called its
Which device produces the electric current?
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A constant current I flows through a horizontal metal wire in the plane of the paper from east to west as shown in the figure. The direction of magnetic field will be from north to south at a point :
What is that instrument which can detect the presence of electric current in a circuit?
The direction of magnetic field developed around a current-carrying conductor can be easily found by the use of
Who has stated the Right hand Thumb Rule?
The strength of the magnetic field around a current-carrying straight conductor
What should be the core of an electromagnet?
The strength of a magnetic field inside a long current-carrying straight solenoid coil is
The most important safety method used for protecting home appliances from short circuiting or overloading is
An electron moves with a speed v along positive direction of x-axis. If a magnetic field B acts along the positive y-direction, then the force on the electron will act along
The strength of magnetic field along the axis of a solenoid coil :
The strength of magnetic field inside a long current carrying straight solenoid is
A current-carrying conductor is placed perpendicular to the direction of a uniform magnetic field. The direction of force acting on the conductor due to magnetic field is given by
Commercial electric motors do not use
A uniform magnetic field exists in the plane of paper Electron Proton pointing from left to right as shown in the figure. In the field an electron and a proton move as shown. The electron and proton experience
For a current in a long straight solenoid N-pole and S-poIe are created at the two ends. Among the following statements, the incorrect statement is
Choose the wrong statement out of the following :
If the circuit is closed and magnetic field lines are drawn over the horizontal plane ABCD, the lines are
146 videos|358 docs|249 tests
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146 videos|358 docs|249 tests
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