ELECTRIC SWITCH

STATEMENT-1: When an electrical heater is switched on, the colour of the filament gradually changes from red to yellow to almost white. STATEMENT-2: Wien's displacement law states that lambda_(m)T = b (constant).

A charged ball of mass m and charge q is projected from the ground with an initail velocity u and angle of projection theta at the time of projection vertically upward electric field E is switched on. When it reaches the maximum height electric filed is switched off and a horizontal electric feild of same magnitude E is switched on. Then answer the following question (Assume mg> qE) Q In the above experiment

A charged ball of mass m and charge q is projected from the ground with an initail velocity u and angle of projection theta at the time of projection vertically upward electric field E is switched on. When it reaches the maximum height electric filed is switched off and a horizontal electric feild of same magnitude E is switched on. Then answer the following question (Assume mg> qE) Q If the time of flight to the maximum height is t_1 and the time of flight maximum height to the ground is t_2 then

Statement I : Switch is used to close are open electric circuit . Statement II : When switch is closed, then circuit is closed and when it is opened, then circuit is open circuit

Statement I : Switch is used to close and open an electric circuit Statements II : When switch is closed, then circuit is closed and when is opened, then circuit is open circuit

A simple pendulum has a time period T. The bob is now given some positive charge – (1) If some positive charge is placed at the point of suspension, T will increases (2) If some positive charge is placed at the point of suspension, T will not change (3) If a uniform downward electric field is switched on, T will increase (4) If a uniform downward electric field is switched on, T will decrease

A wooden block performs SHM on a frictionaless surface with frequency, v_0 . The block carries a charge +Q on its surface. If now a uniform electric field vecE is switched-on as shown, then the SHM of the block will be

A spring block system undergoes SHM on a smooth horizontal surface, the block is now given some charge and a uniform horizontal electric field E is switched on as shown in Fig. As a result

Protons move rectilinearly in the region of space where there are uniform mutually perpendicular electric and magnetic fields E and B . The trajectory of protons lies in the plane xz as shown in the figure and forms an angle 9 with x-axis. Find the pitch of the helical trajectory along which the protons will move after the electric field is switched off.