Chapter 14 - Electromagnetism - 5

Chapter 14 - Electromagnetism - 5

1. The closed path taken for computation of magnetic flux density is referred as:

a) Gaussian path
b) Lorentzean path
c) Conservative path
d) Amperean path

2. In Galvanometer the restoring couple of the suspension wire is proportional to the angle of deflection as long as the wire obeys:

a) Hooke’s Law
b) Ampere’s Law
c) Faraday’s Law
d) Lenz’s Law

3. In cathode ray oscilloscope, the beam of particles used are:

a) Protons
b) Neutrons
c) Alpha particles
d) Electrons

4. In C.R.O when beam of electron falls on a screen it makes a visible spot because the screen is:

a) Clear
b) Polished
c) Fluorescent
d) Rough

5. In C.R.O when cathode is heated by a filament it emits:

a) Radiation
b) Rays
c) Protons
d) Electrons

6. The brightness of the spot formed on the screen of C.R.O can be controlled by:

a) cathode
b) filament
c) Grid
d) fluorescent screen

7. To convert galvanometer into ammeter small resistance should be connected in:

a) Parallel
b) Series
c) Open circuit
d) Closed circuit

8. For conversion of galvanometer into voltmeter, the resistance connected in series with galvanometer should be:

a) Small
b) Very high
c) None of these
d) Very small

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