the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of its filament increases so the current flowing through a filament lamp is not directly proportional to the voltage accross it.the filament lamp does not obey ohms law its resistance increases as the temerature of...