X State - PHYSICS - Effects of Electric Current

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X State - PHYSICS - Effects of Electric Current - Test 1

* Please maintain the exam time as 1 hrs.

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Name of the Student *

School *

District *

1. Which of the following is not applicable to the heating element *

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high resistance

Ductility of the Material

low melting point

low oxidation

2. When 6 V is applied across the ends of a resistor for 2 seconds, 24 J of energy produces, Then what will be the current through it? *

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3 A

2 A

5 A

12 A

3. Which of the following does not indicate power of a circuit? *

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(a)

(b)

(c)

(d)

4. If R1, R2 are two resistors connected in parallel then the effective resistance, 1/R will be? *

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(a)

(b)

(c)

(d)

5. ________ is low for conductors having high amperage *

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resistance

cross sectional area

intensity of electric current

None of the above

6. What will be the voltage, when an electrical appliance of 500W is allowing 2A of Current ? *

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500 V

250 V

2 V

2.5 V

7. Which among the following gas is filled in incandescent lamps? *

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Evacuated

Oxygen

Nitrogen

Hydrogen

8. Find the odd one from the following *

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Electric Iron

Soldering Iron

Electric fan

Electric heater

9. Find an odd one connected with working principle? *

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Electric Iron Box

Soldering Iron

Safety Fuse wire

Induction Cooker

10. In a circuit the current is reduced to half (1/2),then what will be the change in heat produced. *

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4 times

2 times

becomes half

1/4 th

11. If we replace the nichrome wire in a circuit with aluminium wire, What change will happens to the production of heat in the circuit? *

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decreases

increases

no change

same

12. In a _________ circuit, the total resistance is greater than the largest resistance in the circuit. *

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Parallel

Series

Either series or parallel

Neither series nor parallel

13. What possible values of resultant resistance can one get by combining two resistances, one of value 2 ohm and the other 6 ohm? *

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12Ω , 4Ω

6Ω , 2Ω

8Ω, 1.5Ω

8Ω ,2Ω

14. Calculate the amount of heat energy produced when 1A current flows through a 1Ω resistance wire for 1 hour. *

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360 J

3600 J

4200 J

1 J

15. An electric appliance designed to work at 230 V has 690 Ohm resistance. Find its power? *

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0.01 W

767 W

76.7 W

3 W

16. It is marked as 40 W 230 V on an incandescent lamp. If it is given 115 V to this lamp, its power will be ...... *

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40W

20W

10W

none of the above

17. If three 2 ohm resistors are connected in ....... mode, the minimum resistance of ....... can be made available *

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parallel, 3/2 ohm

series, 3/2 ohm

parallel, 2/3 ohm

series, 2/3 ohm

18. The switch in the circuit is off. a. What will be the ammeter reading? b. What about the current if the switch is ON? *

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0.5 A, 0.4A

2A, 2.5A

0.5A, 5A

0.5A, 2.5 A

19. An electric device has marking 200V, 800W on it. What is the resistance of electric bulb ? *

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4 𝞨

200 𝞨

50 𝞨

500 𝞨

20. Which among the following is a correct representation of joules law is ... *

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H = IRt

H = VIt

H = VI/t

H = VRt

21. Safety fuse is normally connected as.......... *

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Parallel

Series

Both Series and Parallel

none of the above

22. Find out the energy change in an electric heater? *

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Electrical energy → Light energy

Mechanical energy → Electrical energy

Electrical energy → Heat energy

None of these

23. The amount of energy consumed by an electrical appliance in unit time is its ___________. *

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Amperage

Guage

Power

None of these

24. Fuse wire is a combination of............ *

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Tin and Lead

Tin and Nichrome

Tin and Mercury

Tin and Tungsten

25. The equivalent resistance across A and B is *

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35 𝞨

75 𝞨

20 𝞨

33 𝞨

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