Current Electricity - Jamb Physics Past Questions and Answers

Question 131:

• JAMB 2018

A resistor connected to a 12V battery draws a current of 2A. The energy dispatched in the resistor in 5 minutes is ___.

A. 3,600J
B. 6,000J
C. 7,200J
D. 14,400J

Question 132:

• JAMB 2019

In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6\(\Omega\) is connected to the other end of the wire. Determine the value of the unknown resistance

A. 3.2\(\Omega\)
B. 1.4\(\Omega\)
C. 3.21\(\Omega\)
D. 1.2\(\Omega\)

Question 133:

• JAMB 2019

Three resistors with resistance 200Ω, 500Ω and 1kΩ are connected in series. A 6v battery is connected to either end of the combination. Calculate the potential difference between the ends of 200Ω resistance.

A. 0.71V
B. 0.7V
C. 0.82V
D. 0.8V

Question 134:

• JAMB 2020

In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?

A. Temperature is a measure of the average kinetic energy of the molecules of a substance
B. Heat is a measure of the total kinetic energy of the molecules in a system
C. Different materials require different amounts of heat to cause a given change in temperature
D. All of the above

Question 135:

• JAMB 2020

The effect of closing the key K in the circuit shown in the figure above would be to?

A. Increase the current by 0.4A
B. Reduce the current by 0.4A
C. Increase the current by 0.6A
D. Reduce the current by 0.6A