Jamb Physics Past Questions For Year 1978
Question 6
The latent heat of fusion of ice is 80cal g-1. How much heat is required to change 10g of ice at Q°C into water at the same temperature?
- A. 80 cal
- B. 10 cal
- C. 8 cal
- D. 800 cal
- E. 400 cal
Question 7
In a D.C. circuit, a 10 microfarad (mf) capacitor is placed in series with a 10 0hm resistor. The total resistance of the combination is
- A. 10 ohms
- B. 1 ohms
- C. zero
- D. 20 ohms
- E. infinite
Question 8
In order to convert a galvanometer into an ammeter
- A. a low resistance shunt is connected in parallel
- B. a low resistance shunt is connected in series
- C. a medium resistance shunt is connected in series
- D. a high resistance shunt is connected in parallel
- E. a high resistance shunt is connected in series
Question 9
A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
- A. the number of turns in the coil
- B. the strength of the magnet
- C. the speed at which the magnet is moved
- D. all of the above
- E. none of the above
Question 10
If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?
- A. 24k
- B. 55k
- C. 40k
- D. 26k
- E. 32k
