10th Class Physics MCQS
A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.
60 V
45 V
30 V
0 V
When an electric current passes through a conductor, which field is produced around it?
Gravitational field
Electrostatic field
Electric field
Magnetic field
The end of solenoid from which lines of force emerge out is called:
None of these
North pole
North and south pole
South pole
An object gains excess negative charge after being rubbed against another object, which is:
Either, a, b or c
Negatively charged
Neutral
Positively charged
In NOT gate number of input terminals is/are:
4
2
1
3
Transformer which increase voltage is called.
Step down transformer
D.C.Moter
Step-up transformer
A.C.genrator
The refracted light striking to the side of prism is called:
Incident ray
Refracted ray
Reflected ray
Emergent ray
Transformer Works on the principle of:
Induction
Self induction
Electro statatic
Mutual induction
According to Fleming’s left hand rule the direction of force on the conductor is given by:
Middle finger
Fore finger
Thumb
None of these
Who discovered Electromagnetic induction?
Coulomb
Flemiing
Ohm
Michael Faraday
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