Question 4476:

• NECO 2003

Which of the following statement(s) is/are correct about the isotopes of an elements? They have the same

I. chemical properties
II. nucleon number
III proton number

A. I only
B. II only
C. I and II only
D. I and III only
E. I,II and III

Question 4477:

• NECO 2003

Lenz’s law of electromagnetic induction states that ____________

A. A force is exerted on a current carrying conductor in a magnetic field
B. The induced current in a conductor is in such a direction as to oppose the change producing it
C. The magnitude of the induced electromotive force in a circuit is proportional to the rate of change of the number of lines of force linking the circuit
D. The magnitude of the induced electromotive force is proportional to the current producing the magnetic flux
E. Whenever there is a change in the magnetic flux linked with the circuit, an electromotive is induced

Question 4478:

• NECO 2003

An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance between the object and the image.

A. 90cm
B. 40cm
C. 30cm
D. 20cm
E. 10cm

Question 4479:

• NECO 2003

Which of the following properties is NOT exhibited by sound waves?

A. Diffraction
B. Interference
C. Polarisation
D. Reflection
E. Refraction

Question 4480:

• NECO 2003

An evidence of the wave nature of matter is ____________

A. Browniam motion
B. Compton effect
C. Diffraction
D. Diffusion
E. Photo electricity