Class 10th Physics Chapter 14


Total Marks: 25

1. What is the formula for e.m.f?
J/Q=E W/Q=E W/l=E Q/I=E
2. The unit of current is ?
Volts Joule Ampere Columbus
3. in metals ,current produced only due to the flow of
proteins Electrons neutrons free electrons
4. In electrolyte we assume that electric current is always due to the flow of .
Both a ,c Positive charges Neutral Particles Negative charges
5. The instrument with which we can detect the presence of current in a circuit is know as :
Volt meter ammeter galvanometer Ohm meter
6. In order to the current galvanometer is connected in circuit ?
parallel series parallel or series anywhere in the circuit
7. Galvanometer is a very ?
Sensitive instrument large instrument small instrument InSensitive instrument
8. By connected the shunt across the galvanometer ,the resistance of galvanometer
decreases increase remaine same non of these
9. The resistance of an ammeter should be
High Very high Low Very low
10. The value of current passing through a conductor is directly proportional to the
Resistance capacitance Potential Difference none of these
11. Voltmeter always connected in a circuit in
series parallel series or parallel none of these
12. The time interval after which the voltage repeats its value is known as
frequency Time period Electric field Electromagnetic field
13. Ohm\'s law applicable to
Liquids only Gases only Liquid conductors only Metallic conductors only
14. Write the SI unit of resistance ?
Ampere Volts Ohm Faraday
15. The property of substance which opposes the flow of current through it is called
conductivity capacitance resistance Conduction
16. If we increase the cross sectional area of the wire to double of its orignal area its resistance will become
remain same halved one fouth Doubled
17. Electric energy is distributed to various house in a city from a power station by means of ?
one wire four wire three wire two wire
18. the unit of electric power is ?
Ampere Jules Watts Volts
19. color coding for netural wire is ?
Black or blue Red or brown yellow or yellow White or purple
20. Power of hair dryer
130 watts 1000 watts 1500 watts 800 watts
21. When we double the voltage in a simple electric we double the
current power both a.b resistance
22. What happens to the intensity or the brightness of the lamps connected in series and more lamps are added?
Increases Remains the same Cannot be predicted Decreases
23. Electric potential and e.m.f
Are the same terms Are the different terms Have different units Both a and b
24. If we double both the current and the voltage in a circuit while keeping its resistance constant, the power
Remains unchanged Four times Halves Quarter
25. What is the power rating of a lamp connected to a 12 V source when it carries 2.5 A ?
4.8 W 14.5 W 30 W 60 W