Explanation:

Explanation: The net magnetic field inside a solenoid is given by the vector sum of the fields due to all the turns of the solenoid. In a solenoid, each turn of the wire generates a magnetic field, and the magnetic fields from all the turns add up to produce a stronger net magnetic field inside the solenoid.

Explanation: The current amplification factor, denoted by β (beta), is a key parameter of a bipolar junction transistor (BJT) that measures its efficiency in amplifying current. It is defined as: β=ΔIc/ΔIB where: • ΔIc is the change in collector current. • ΔIB is the change in base current. This factor indicates how much the collector current increases for a given increase in the base current, while keeping the collector-emitter voltage (VCE) constant.

Explanation: Generally, as the bond length between two atoms increases, the bond energy decreases. This is because longer bonds indicate that the atoms are further apart, resulting in weaker interactions and a lower energy required to break the bond. In contrast, shorter bonds are stronger and require more energy to break, leading to higher bond energy.

Explanation: Floriculture is indeed a branch of biology focused on the cultivation and study of ornamental flowers and plants. It encompasses various aspects, including the breeding, growing, and marketing of flowers and decorative plants.

Explanation: Downy mildew disease is caused by a fungus. Specifically, it is caused by various species of the Oomycete group, which are fungal-like organisms. These pathogens affect a range of plants, leading to characteristic symptoms such as yellowing and downy growth on the undersides of leaves.