10th Class Physics MCQS
A.C generator works on the principle of:
Third law of motion
Electrostatic induction
Law of gravitation
Electromagnetic induction
In SI the unit of charge is
Joule
Coulomb
Watt
Volt
To see from submarine and the ship at the surface of water, we use
Prism
Telescope
Microscope
Periscope
The lines will be in the form of concentric circles, if conductor is:
Straight
Circular
Solenoid
None of these
A current carrying conductor produces a field around it is called:
None of these
Electric field
Both a and b
Magnetic field
Spherical mirrors are used in:
Medical
Microscope
Search light
All of these
Optical fibres works on the principle of:
Diffraction
Total internal reflection
Reflection
Refraction
Changing magnetic field in a closed circuit can induce:
e.m.f
Both A and B
Electric current
Force
In D.C.motor split rings are made of:
Iron
Copper
Steel
Carbon
If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:
Clock wise
Anti-clock wise
Left and Right
Along the conductor.
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