Current Electricity - Jamb Physics Past Questions and Answers

Question 56:

• JAMB 1989

The total power drawn from the cell in the circuit above is

A. 12W
B. 24W
C. 32W
D. 40W

Question 57:

• JAMB 1990

Three cells each of e.m.f. 1.5v and an internal resistance of 1.0\(\Omega\) are connected in parallel across a load resistance of 2.67\(\Omega\). Calculate the current in the load?

A. 0.26A
B. 0.41A
C. 0.50A
D. 0.79A

Question 58:

• JAMB 1990

When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?

A. 1.10\(\Omega\)
B. 1.64\(\Omega\)
C. 2.44\(\Omega\)
D. 27.50\(\Omega\)

Question 59:

• JAMB 1990

A lamp is rated 240V, 60W. The resistance of the filament is

A. 960\(\Omega\)
B. 16\(\Omega\)
C. 15\(\Omega\)
D. 4\(\Omega\)

Question 60:

• JAMB 1990

A 0 - 10mA galvanometer with a coil resistance of 30\(\Omega\) can be converted to a 0 - 10A ammeter by using

A. 0.03\(\Omega\) series resistor
B. 0.03\(\Omega\) shunt resistor
C. 9.99\(\Omega\) shunt resistor
D. 9.99\(\Omega\) series resistor