Jamb Physics 1993 Past Questions and Answers

Question 26:

• JAMB 1993

A current carrying conductor experiences a force when placed in a magnetic field because the

A. Conductor is magnetized
B. Magnetic field of the current interacts with external magnetic field
C. Force is due to the motor principle
D. Electric field of the current interacts with the external magnetic field

Question 27:

• JAMB 1993

A simple cell with mercury-amalgamated zinc electrode prevents

A. Local actions
B. Polarization
C. Buckling
D. Degradation

Question 28:

• JAMB 1993

The terminal voltage of a battery is 4.0V when supplying a current of 2.0A, and 2.0V when supplying a current of 3.0A. The internal resistance of the battery is

A. 0.5 \(\Omega\)
B. 1.0\(\Omega\)
C. 2.0\(\Omega\)
D. 4.0\(\Omega\)

Question 29:

• JAMB 1993

A current of 100mA passes through a conductor for 2 minutes. The quantity of electricity transported is

A. 200C
B. 50C
C. 12C
D. 0.002C

Question 30:

• JAMB 1993

A parallel plate capacitor of area 10cm² in vacuum has a capacitance of 10^-2\(\mu\)F. What is the distance between the plates?(e[sub][/sub] = 9 x 10^-12fm)

A. 9 x 10^-13m
B. 9 x 10^-7m
C. 9 x 10^-3m
D. 9 x 10⁷m