1) What is the main disadvantage of an incandescent lamp.
Answer : In incandescent lamp a major portion of electrical energy used is lost as heat.
2) The potential difference between two points will be one volt if _____________joule of work is done in moving one coulomb of charge from one point to the other. (4.2J, 1J, 10J, 3.2J)
Answer : 1J
3) A Tungsten wire Is stretched to double its length. How many times more the quantity of heat produced due to current flow than the former length? (double, half, four times, f/4)
Answer : 1/4
4) 2A current is passed through a conductor. What will be the amount of electric charge produced in 2 second?(2C, 1C, 4C, 3C)
Answer : 4C
5) The connecting wires of a soldering iron does not heat. Choose the correct statement relating to this.
a. The flow of current through it is zero.
b. Specific heat capacity of copper is high.
c. Having low voltage
d. Copper has low resistance
Answer: Copper has low resistance
6) Which one is the correct statement relating to the heating coil of an electric heating appliances.
a) Low resistivity
b) High resistivity
c) Low melting point
Answer: High resistivity
7) Safety fuse is a device that works on the heating effect of electric current. From the following, choose the wrong statement relating to fuse wire.
a) It is an alloy of suitable metals.
b) Low melting point.
c) In each circuit, a fuse wire of suitable amperage is used.
d) High melting point
Answer : High melting point
8) Write the name of an electronic appliance which works on the lighting effect of electric current.
Answer : LED lamp
9) Which color of light produced from sodium vapor lamp.(Green, Blue, Red, Yellow)
Answer : Yellow
10) Arrange the following statements in suitable order relating to the
working of a safety fuse.
a) Melting of fuse wire.
b) High electric current in the circuit due to short circuit and over loading.
c) Circuit is broken and current through the circuit stops.
d) More heat is produced in the fuse wire.
Answer : 2, 4, 1, 3
11) Write an example of a discharge lamp.
Answer : Fluorescent lamp
12) Choose the wrong statement from the following. If wrong correct them.
a)
Fuse wire is connected to the circuit in parallel.
b)
Copper wire is used as fuse wire.
c)
Fuse wire possess appropriate amperaqe.
d)
Fuse wire has hiqh meltinq point.
Answer : a) False - Fuse wire is connected to the circuit
in series.
13) What happens if the interior of the bulb is not evacuated?
Answer : Filament gets oxidized and burst off.
14) If the electric current throuqh a conductor increases, what will happened to the heat produced.(increases, decreases)
Answer : Increases
15) Which metal is used as the filament in incandescent lamp?
Answer : Tungsten
16) In discharge lamp heating coil coated with thorium oxide. Why?
Answer : To increase the emitting power of the heating
coil.
17) When there is no change in resistance the power becomes If the voltage is
halved.
a)Decreases to 1/4
b)Decreases to 1/16
c)Doubled 1
Answer : Decreases to 1/4
18) Discharge lamps are in various color's. Why?
Answer : The color of light depends on the gas inside the
discharge lamp.
19) In which type of lamp contain mercury vapor which is detrimental to environment.
Answer : Fluorescent lamp and CF lamp.
20) Write one main advantage of LED lamp?
Answer : It requires only a small quantity of power.
21) An electric heater marked 800 W,400 V. What is the meaning of this statement.
Answer : If it works in 400 V - get 500 W power
22) Which are the circumstances that cause high electric current in the circuit?
Answer : Short circuiting and over loading.
2323) Which type of lamp used In search lights and film shooting.
Answer : Arc lamps
24) The amount of work done by an electrical appliance in unit time.
Answer : Power
25) Unit of power
Answer : Watt
26) Which type of lamp is used paultry farms ?
Answer : Filament lamps
27) An appliance which produce heat without heating coil
Answer : Induction cooker
28) In which type of electric lamp more electrical energy is converted into heat.
Answer : Incandescent lamp
Other important links
Class10-Physics-Ch1-Effects
of Electric current - Main reference
Class10-Physics-Ch1-Effects
of Electric current - 1 mark expected question - page-1
Class10-Physics-Ch1-Effects
of Electric current - 1 mark expected question - page-2
Class10-Physics-Ch1-Effects
of Electric current - 2 mark expected questions
Class10-Physics-Ch1-Effects
of Electric current - 3 mark expected questions