Waec Physics 2001 Past Questions and Answers

Question 41:

• WAEC 2001

The material used for constructing the core of an electromagnet is

A. Iron
B. Carbon
C. Copper
D. Steel

Question 42:

• WAEC 2001

In the circuit diagram above. Calculate the energy stored in the inductor at resonance

A. 0.100J
B. 0.050J
C. 0.010J
D. 0.005J

Question 43:

• WAEC 2001

Calculate the reactance of the inductor in the circuit diagram shown above [\(\pi = \frac{22}{7}\)]

A. 132\(\Omega\)
B. 214\(\Omega\)
C. 264\(\Omega\)
D. 269\(\Omega\)

Question 44:

• WAEC 2001

Production of x-ray tube begins with

A. Photo electric emission
B. Collision of electrons
C. Thermionic emission
D. Field emission of electrons

Question 45:

• WAEC 2001

A nitrogen nucleus bombarded with an alpha particle produces an oxygen nucleus and a proton. The nuclear reaction for this process is \(^4_2H + ^{14}_2N \to ^{17}_{8}O + ^1_1H + Q\). Which of the following statements about the reaction is not correct?

A. The bombardment results into a nucleus with greater proton number
B. It is an induced nuclear reaction
C. It is a natural radioactive decay
D. The sum of the final nucleon numbers