cameroon gce advanced level 2025 electrical and electronic circuits 2

Question 1

 

a) Find the value of RL​ for maximum power transfer in the circuit of Figure 1. What is the value of this maximum power? (15 marks)

b) Considering the circuit of Figure 2, the load is RL​. Determine the Thevenin parameters and draw the Thevenin equivalent circuit. (15 marks)

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Question 2

 

In the circuit of Figure 3 use Thevenin theorem to determine the current passing through the load impedance 50∠30∘Ω. (30 marks)

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Data from Image 2: Physics

 

 

Question 1

 

If P and Q​ are two forces acting at the same point with α being the angle between them as shown in the Figure below. The resultant R according to the parallelogram law of forces is:

A. R=(P2+Q2+2PQcosα)​

B. R=(P2−Q2−2PQcosα)​

C. R=(P+Q+2PQcosα)​

D. R=(P2+Q2+2PQcosα)​

 

Question 2

 

Two wires are exerting tensile forces through a ring as indicated in the Figure below. Assuming it is a concurrent system, determine the resultant force.

A. R=708N

B. R=70.81N

C. R=70.81N

D. R=7.81N

 

Question 3

 

Calculate the resultant force for F1 = 40KN inclined at 60∘ from the y axis and F2 = 20KN.

A. 40KN

B. 20KN

C. 34.64 KN

D. 0KN

 

Question 4

 

When an applied force in a body is less than the limiting frictional force, the body remains in equilibrium. This phenomenon is known as?

A. Dynamic Friction

B. Sliding Friction

C. Static Friction

D. Kinetic Friction

 

Question 5

 

The maximum frictional force which comes into play, when a body just begins to slide over the surface of another, is known as?

A. sliding friction

B. rolling friction

C. angular friction

D. limiting friction

 

Question 6

 

The centre of gravity of a triangle is at the point where three:

A. bisectors of the angle of the triangle meet

B. perpendicular bisectors of the sides of the triangle meet

C. medians of the triangle meet

D. bisectors don’t meet

 

Question 7

 

The second moment of area of a rectangle about an axis through its centroid and parallel to its height is

A. 3bh3​

B. 12bh3​

C. 3hb3​

D. 12hb3​

 

Question 8

 

The ratio of the moment of inertia of a rectangle about its base axis to that of the moment of inertia about its centre axis is?

A. 21​

B. 4

C. 41​

D. 2