12th Class Physics MCQS
For accurate measurement of current through a circuit, the resistance of ammeter should be
Very small
Very high
None of the above
Neither small nor high
The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor
Oersted
Faraday
Henry
Coloumb
Weber is the unit of
None of above
magnetic force
Magnetic flux
Permeability
A galvanometer is an electrical instrument used to
None of these
Detect passage of current
Measure voltage
Measure resistance
NIBA =
c?
c2?
c2/?
?/c
A photon while passing thorugh a magnetic field are deflected towards:
None of these
North pole
Are ionized
South pole
CRO works by deflecting the beam of electron as they pass through
Uniform magnetic field
Uniform electric field between two sets of parallel plates
Non-uniform magnetic field
None of these
The magnetic field is uniform and stronger
None of these
Outside the solenoid
At the central part of the solenoid
Inside the solenoid
An ammeter is an electrical instrument which is used to measure.
None
Resistance
Current
Voltage
In CRO, the output waveform of time base generator is
Sinusoidal
Circular
Saw-toothed
Square
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