Physics Past Questions and Answers

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:

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:

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:

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:

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.