Question 296:

• JAMB 1984

For a concave mirror to form a teal diminished image, the object must be placed

A. Behind the mirror
B. Between the mirror and its focus
C. Between the focus and the centre of curvature
D. At the centre of curvature
E. At a distance greater than the radius of curvature

Question 297:

• JAMB 1984

The unit of quantity of electricity is called

A. The ampere
B. The volts
C. The coulomb
D. The ammeter
E. Electromotive force

Question 298:

• JAMB 1984

The resistance of a wire depends on

A. The length of the wire
B. The diameter of the wire
C. The temperature of the wire
D. The resistivity of the wire
E. All of the above

Question 299:

• JAMB 1984

Two cells each of e.m.f. 1.5V and an internal resistance 2\(\Omega\) are connected in parallel. Calculate the current flowing when the cells are connected to a 1\(\Omega\) resistor

A. 0.75\(\Omega\)
B. 1.5\(\Omega\)
C. 0.5\(\Omega\)
D. 1.0\(\Omega\)
E. 0.6\(\Omega\)

Question 300:

• JAMB 1984

Which of the following components is NOT contained in a dry cell? A

A. Carbon rod
B. Paste of magnesium dioxide
C. Paste of ammonium chloride
D. Zinc case
E. Copper rod