1987 年

The circuit shows a lamp of rating '$6$ V, $9$ W' connected in series with a resistor $R$ and a $9$ V battery. What should be the resistance of $R$ if the lamp is to work as rated ?

In the circuit shown, all resistors are the same. If the current passing point $X$ is $1$ A, what will be the current delivered from the battery ?

The above circuit shows two resistors $R_1$ and $R_2$ connected in series to a battery. The resistance of $R_1$ is greater than that of $R_2$. The ends of the resistors are marked $P$, $Q$, $R$ and $S$. Which of the graphs best shows how the potential $V$ varies along $PS$ ?

A light coil of wire $XY$ is suspended by insulating string such that it can swing freely. A solenoid connected to a cell with a switch $S$ is placed near to the end $Y$ of the coil as shown. What would happen to the coil $XY$ just when the switch $S$ is closed ?

In the figure shown, an electron travels in a horizontal direction and enters a uniform electric field. The direction of the electric field is as shown. What is the direction of the force due to the electric field acting on the electron ?