The diagram in Fig. shows the electrical system of a car to operate the two head lights and two rear lights by a switch. shows a connection to the body of the car. The two rear lights as connected in diagram glow faintly. Why do they glow faintly? How should they be connected to glow brightly ? Show by a separate diagram.
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The two rear lights are connected in series so each light glows at half the voltage of the battery (if the resistance of filament of each bulb is same). Hence they glow faintly. They must be connected in parallel to glow properly as shown below in Fig.
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