10th Class Physics MCQS
LDR can act as:
Diode
Switch
Rectifier
Transistor
What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added?
Increases
Decreases
Remains the same
Can not be predicted
Which we double the voltage in a simple electric circuit. We double the
Power
Resistance
both a and b
Current
What should household appliances be connected in parallel with the voltage source?
to provide each appliance the same voltage as the power source
to provide each appliance the same current as the power source
to decrease the resistance of the circuit
to increase the resistance of the circuit
What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?
30 W
4.8 W
14.5 W
60 W
Which instrument is used to detect current?
Electroscope
Voltmeter
Ammeter
Galvanometer
That period in which voltage repeats its value in equal intervals is called:
Amplitude
cycle
Frequency
Time period
Current is equal to:
Q/t
CV
IR
IR2
Which instrument measures the potential difference:
Barometer
Voltmeter
Galvanometer
Ammeter
Image formed on a camera is:
Real, inverted and magnified
Virtual, upright and magnified
Real, inverted, and diminished
Virtual, upright and diminished