Question 4416:

• NECO 2002

The use of electrical fuses in domestic wiring is ____________

A. To prevent and electrical shock
B. To supply electricity to all the electrical appliances
C. To allow electricity to flow easily through the mains to all the circuits
D. To cut off the mains supply it too high a current flows
E. To fuse all the circuit into one

Question 4417:

• NECO 2002

Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?

A. Alpha rays
B. Gamma rays
C. Positive rays
D. Ultraviolet rays
E. X-rays

Question 4418:

• NECO 2002

An object is projected with a velocity of 50ms^-1 from ground level at an angle θ to the vertical. If the total time of flight of the projectile is 5s, what is the value of θ? (g = 10ms^-2)

A. 0°
B. 30°
C. 45°
D. 60°
E. 90°

Question 4419:

• NECO 2002

What is stored by a dry Leclanhé cell?

A. Chemical energy
B. Heat energy
C. Mechanical energy
D. Nuclear energy
E. Solar energy

Question 4420:

• NECO 2002

Lenz’s law of electromagnetic induction states that ____________

A. E.m.f. is induced in a circuit whenever there is a change in the magnetic flux linked with the circuit
B. The induced e.m.f. in a circuit is proportional to the rate of change f the number of lines of force linking the circuit
C. The induced current in a conductor is in such a direction as to oppose the change producing it
D. A force is exerted in a current-carrying conductor in a magnetic field.
E. The induced e.m.f. is proportional to the current producing the magnetic flux.