10th Class Physics MCQS
The coil of a transformer which is connected to A.C is called:
Secondary coil
Field coil
Primary coil
Armature coil
Two uncharged objects a and b are rubbed against each other. When object b is placed near a negatively charged object c, the two objects repel each other. Which of these statements is true about object a:
Becomes negatively charged
Remains uncharged
Unpredictable
Becomes positively charged
The turn ratios of a transformer is 10. It means.
Ns = 10 Np
Ns = Np
Vs =Vp /10
Is = 10Ip
In C.R.O grid is always connected with potential:
Zero positive
Negative
High positive
Positive
The ray of light after reflection from concave mirror passes through
Centre
Radius
Principal focus
Pole
The angle at which prism deviates the incident ray is called:
Angle of reflection
Angle of deviation
Angle of incident
Angle of minimum deviation
The direction of induced e.m.f. in a circuit is in accordance with conservation of.
Momentum
Mass
Energy
Charge
The presence of a magnetic field can be detected by a
Stationary negative charge
small mass
Magnetic compass
Stationary positive charge
The output of a NAND gate is 0 when:
Any of its inputs is 1
Both of its inputs are 0
Any of its inputs is 0
Both of its inputs are 1
The instrument which is used to display the magnitude of changing electric current is called:
Cathode rays oscilloscope
Evacuated tube
Picture tube
Television tube
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