Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?

When you curl your right hand fingers in the direction of current. Which finger shows the direction of magnetic field?

An electron moving horizontally from left to right in a region where a magnetic field exists vertically downwards describes: (when seen from above)

An electron travelling horizontally towards west enters into a magnetic field acting vertically down wards. It deflects towards

An electron falling freely under gravity enters a region of uniform horizontal magnetic field pointing north to south. The particle will be deflected towards

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 ms, at right angles to the horizontal component of the earth's magnetic field, 0.30 xx 10^(-4)Wb m^(2) What is the direction of the emf?

A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south direction. Null points are found on the axis of the magnet at 14 cm from the centre of the magnet. The earth's magnetic field at the place is 0.36 G and the angle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null-point (i.e., 14 cm) from the centre of the magnet ? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth's magnetic field.)

A beam of charged particles of charge q and a mass m are accelerated from rest through a potential difference of 100V. They pass through crossed electric and magnetic fileds which together produce null deflection .If these electronic and magnetic fields are respectively 15xx10^(3)Vm^(-1)and 5Wbm^(-2) ,then q/m has a value, in C kg^(-1) ,equal to