Simple A. C. Circuits - Jamb Physics Past Questions and Answers

Question 26:

• JAMB 2008

Given the inductor of inductance 5mH, 10mH and 20mH connected in series, the effective inductance is

A. 0.35mH
B. 3.50mH
C. 2.90mH
D. 35.0mH

Question 27:

• JAMB 2010

Two inductors of inductances 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is

A. 500.0J
B. 250.0J
C. 62.5J
D. 50.0J
E. No correct option

Question 28:

• JAMB 2010

In alternating current circuit at resonance, the angel of lead or lag is

A. π°
B. (π)/2°
C. (π)/3°
D. 0°

Question 29:

• JAMB 2010

In alternating current circuit at resonance, the angel of lead or lag is

A. π°
B. (π)/2°
C. (π)/3°
D. 0°

Question 30:

• JAMB 2011

In measuring high frequency a.c, the instrument used is the

A. D.c ammeter
B. Moving coil ammeter
C. Moving iron ammeter
D. Hot wire ammeter