10th Class Physics MCQS
The output of a two input NOR gate is 1 when:
Both a and b are 1
Both a and b are 0
A is 0 and B is 1
A is 1 and B is 0
Electric motor converts electrical energy into:
Heat energy
Chemical energy
Solar energy
Mechanical energy
Bouncing back of light after striking the surface is called:
Interference
Reflection
Refraction
Diffraction
The voltage is decreased by:
Step up transformer
D.C. Motor
A.C. generator
Step-down transformer
Number of poles in a magnet is:
Three
Unlimited
One
Two
Which part of a D.C. motor reverses the direction of current through the coil every half cycle.
The armature
The burshes
The slip rings
The commutator
The cathode ray oscilloscope consists of main parts:
Two
Four
Five
Three
D.C. motor converts.
Electrical energy into mechanical energy
Electrical energy into chemical energy
Mechanical energy into chemical energy
Mechanical energy into electrical energy
When did Michael Faraday discover Electromagnetic induction?
1811
1841
1821
1831
The true ratio of a transformer is 10. It means:
Ns = Np/10
Ns = 10NP
VS= Vp/10
Vs = 10Vp
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