Choose the correct alternative (a), (b), (c) or (d):

• ∈₀= 9∈_w 
• ∈₀=81∈_w
• ∈_w=9∈₀ 
• ∈_w=81∈_o 

Five resistors are connected as shown in Figure 1. 



The effective resistance i.e. equivalent resistance between the points A and B is:

• 4Ω 
• 5Ω
• 20Ω   
• 20Ω

The Biot Savart’s Law in vector form is:

• 
• 
• 
• 

B.

In an astronomical telescope of refracting type :

• Eyepiece has greater focal length.
• Objective has greater focal length.
• Objective and eyepiece have equal focal length.
• Eyepiece has greater aperature than the objective

The particles which cannot be accelerated by a cyclotron or a Van de Graff generator are :

• Alpha particles 
• Beta particles
• Neutrons   
• Protons