MCQ Chapter 12 Electricity Class 10 Science

Please refer to Electricity MCQ Questions Class 10 Science below. These MCQ questions for Class 10 Science with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Electricity will help you to prepare for the exams and get more marks.

Electricity MCQ Questions Class 10 Science

Please see solved MCQ Questions for Electricity in Class 10 Science. All questions and answers have been prepared by expert faculty of standard 10 based on the latest examination guidelines.

MCQ Questions Class 10 Science Electricity

Question: Three resistances of 4Ω, 5 Ω and 20 Ω are connected in parallel. Their combined resistance is
(a) 2 Ω
(b) 4 Ω
(c) 5 Ω     
(d) 20 Ω

Question: Three resistors of resistances R₁, R₂ and R₃ are connected in series. If I is the current passing through R1
(a) 1:1
(b) 1:2   
(c) 1:3
(d) 1:4

Question: The direction of electric current is taken as _______________ to the direction of the flow of electrons.
(a) Same      
(b) Opposite   
(c) Both
(d) None

Question: Three resistances of 1 Ω each are connected to form a triangle. The resistance between any two terminals is
(a) 3 Ω
(b) 1/2 Ω   
(c) 2/3 Ω
(d) 3/2 Ω

Question: How is fuse connected to the electric device?
(a) Series
(b) Parallel
(c) Both   
(d) None

Question: State which of the following is correct?
(a) Joule = Coulomb x volt
(b) Joule = Coulomb/volt 
(c) Joule = Volt/ampere
(d) Joule = ampere/volt

Question: What is the current rating for the circuit used for bulbs, fans, etc?
(a) 5 A
(b) 10 A
(c) 15 A 
(d) 20 A

Question: When a current of I ampere is passed through a resistor of R ohm for t seconds, then the amount of heat produced is
(a) H = I²Rt Cal   
(b) H = I²Rt Kcal
(c) H = I²Rt joule
(d) H = I₂Rt/4.18 joule

Question: Which electrical component protects from short circuiting?
(a) Fuse
(b) Resistor
(c) Electric plug     
(d) Switch

Question: Electric power is given by
(a) P = V/I
(b) P = I/V
(c) P = I/VI   
(d) P = VI

Question: A _______________ consists of a piece of wire made of metal or an alloy (37% lead, 63% tin).
(a) Fuse
(b) Resistor
(c) Electric plug 
(d) Switch

Question: The practical unit of electrical energy
(a) Watt
(b) Kilowatt 
(c) Kilowatt hour
(d) Kilo Joule

Question: The SI unit of electric power is
(a) Coulomb
(b) Ampere   
(c) Joule
(d) Watt

Question: How many joules are there in 1 kilowatt hour?
(a) 3.6 x 10³
(b) 3.6 x 10⁴   
(c) 3.6 x 10⁵
(d) 3.6 x 10⁶

Question: A smell heating element connected to a 10 V battery draws a current of 5 A. How much electric power is supplied to the heater?
(a) 15 W
(b) 25 W
(c) 2 W 
(d) 50 W

Question: Watt is the unit of
(a) Electric current
(b) Electric energy   
(c) Electric power
(d) Potential difference

Question: Kilowatt hour is the unit of
(a) Electric power
(b) Electric resistance   
(c) Electric potential
(d) Electric energy

Question: Electrical resistivity of a given metallic wire depends upon:
(a) its length
(b) its thickness 
(c) its shape
(d) nature of the material

Question: Identify the circuit, the diagrams given below, in which the electrical components have been properly connected  

(a) (i)
(b) (ii)
(c) (iii)     
(d) (iv)

Question: A cell, a resistor, a key and an ammeter are arranged as shown in the circuit diagrams. The current recorded in the ammeter will be:  

(a) maximum in (i)
(b) maximum in (ii)   
(c) maximum in (iii)
(d) the same in all the cases

Question: The proper representation of series combination of cells, for obtaining maximum potential is 

(a) (i)
(b) (ii)
(c) (iii) 
(d) (iv)

Question: In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be: 

(a) same in all cases
(b) minimum in case (i)   
(c) maximum in case (ii)
(d) maximum in case (iii)

Question: A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly:
(a) 1020
(b) 1010       
(c) 1018
(d) 1023

Question: Which of the following represents voltage?
(a) Work done/Current x Time
(b) Work done x Charge
(c) Work done x Time/Current 
(d) Work done x Charge x Time

Question: What is the maximum resistance which can be made using five resistors each of (1/5) Ω?
(a) (1/5) Ω 
(b) 10 Ω
(c) 5 Ω
(d) 1 Ω

Question: What is the minimum resistance which can be made using five resistors each of (1/5) Ω?    
(a) (1/5) Ω
(b) (1/25) Ω 
(c) (1/10) Ω
(d) 25 Ω

Question: If the current I through a resistor is increased by 100% (assume that temperature remains unchanged),the increase in power dissipated will be:
(a) 100%
(b) 200% 
(c) 300%
(d) 400%

Question: A student carries out an experiment and plots the V-I graphs of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true? 

(a) R₁= R₂ = R₃
(b) R_{1 >} R₂ > R₃ 
(c) R₃ > R₂ > R₁
(d) R₂ > R₃ > R₁

Question: The resistivity does not change if:
(a) the material is changed 
(b) the temperature is changed
(c) the shape of the resistor is changed
(d) both material and temperature are changed

Question. A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination isRl, then the ratio R/Rl is
(a) 1/25
(b) 1/5
(c) 5
(d) 25

Question. Two bulbs have the following ratings:
1. 40 Ω, 220 V
2. 20 Ω, 100 V
The ratio of their resistance is
(a) 1: 2
(b) 2 :1
(c) 1:1
(d) 1: 3

Question. A letter A is constructed of a uniform wire of resistance 1 ohm per cm. The sides of the letter are 20 cm and the cross piece in the middle is 10 cm long.
The resistance between the ends of the legs will be
(a) 32.4 ohm
(b) 28.7 ohm
(c) 26.7 ohm
(d) 24.7 ohm

Question. The current flowing through a wire of resistance 2 Ω varies with time as shown in figure alongside. The amount of heat produced (in J) in 3 s would be

(a) 2 J
(b) 18 J
(c) 28 J
(d) 10 J

Question. 20 coulomb charge is flowing in 0.5 second from a point in an electric circuit then value of electric current in amperes will be
(a) 10
(b) 40
(c) 0.005
(d) 0.05

Question. A wire of resistance R is cut into ten equal parts which are then joined in parallel. The new resistance is
(a) 0.01 R
(b) 0.1 R
(c) 10 R
(d) 100 R

Question. A current of 4.8 A is flowing in a conductor. The number of electrons passing per second through the conductor will be
(a) 3×10²⁰
(b) 76.8×10²⁰
(c) 7.68×10^-19
(d) 3×10¹⁹

Question. What is the current through a 5.0 ohm resistor if the voltage across it is 10 V
(a) zero
(b) 0.5 A
(c) 2.0 A
(d) 5.0 A

Question. The length of a wire is doubled. By what factor does the resistance change
(a) 4 time as large
(b) twice as large
(c) unchanged
(d) half as large

Question. How much work is done in moving a charge of 2 C from a point of 118 V to a point of 128 V?
(a) 20 J
(b) 30 J
(c) 40 J
(d) 10 J

Question. A 24 V potential difference is applied is applied across a parallel combination of four 6 ohm resistor. The current in each resistor is
(a) 1 A
(b) 4 A
(c) 16 A
(d) 36 A

Question. 100 J of heat is produced each second in a 4 Ω resistance. The potential difference across the resistor is
(a) 20 V
(b) 10 V
(c) 5 V
(d) 15 V

Question. Two unequal resistances are connected in parallel.
Which of the following statement is true
(a) current in same in both
(b) current is larger in higher resistance
(c) voltage-drop is same across both
(d) voltage-drop is lower in lower resistance

Question. A cylindrical rod is reformed to twice its length with no change in its volume. If the resistance of the rod was R, the new resistance will be
(a) R
(b) 2R
(c) 4R
(d) 8R

Question:  A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Anotherconductor of length 2 l and resistance R of the same material has area of cross-section:
(a) A/2
(b) 3 A/2
(c) 2 A 
(d) 3 A

Assertion And Reason Based Questions :

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.

Question. Assertion : If r 1 and r 2 be the resistivity of the materials of two resistors of resistances R1 and R₂ respectively and R₁ > R₂ .
Reason : The resistance R = P,1/A ⇒ r₁ > r2 if R₁ > R₂

Question. Assertion : Copper is used to make electric wires.
Reason : Copper has very low electrical resistance.

Question. Assertion : Silver is not used to make electric wires.
Reason : Silver is a bad conductor.

Question. Assertion : Wire A is thin in comparison to wire B of same material same length then resistance of wire A is greater than resistance of wire B.
Reason : Resistivity of wire A is greater than resistance of wire B.

Question. Assertion : A voltmeter and ammeter can be used together to measure resistance but not power.
Reason : Power is proportional to voltage and current.

Question. Assertion : A resistor of resistance R is connected to an ideal battery. If the value of R is decreased, the power dissipated in the circuit will increase.
Reason : The power dissipated in the circuit is directly proportional to the resistance of the circuit.

Question. Assertion : The 200 W bulbs glow with more brightness than 100 W bulbs.
Reason : A 100 W bulb has more resistance than 200 W bulb.

Question. Assertion : The resistivity of conductor increases with the increasing of temperature.
Reason : The resistivity is the reciprocal of the conductivity.

Question. Assertion : If a graph is plotted between the potential difference and the current flowing, the graph is a straight line passing through the origin.
Reason : The current is directly proportional to the potential difference.

Question. Assertion : The equation V = Ri does not apply to those conducting. devices which do not obey Ohm’s law.
Reason : V = RI is a statement of Ohm’s law.

Fill in the Blanks :

Question. ………….. is a property that resists the flow of electrons in a conductor.   

Question. The S.I. unit of resistance is ……………..      

Question. The potential difference across the ends of a resistor is …………… to the current through it, provided its ……………….. remains the same.  

Question. The resistance of a conductor depends directly on its …………., inversely on its …………….., and also directly proportioned on the ………….. of the conductor. 

Question. 1 volt × 1 coulomb = …………..  

Question. If there is no current, a voltmeter connected across a resistor will register………………… voltage.   

Question. Electrical power = (Potential difference)2/……….

Question. Electric energy is produced by the …….. of charges.

Question. Physical quantity represented by coulomb per second is ………. .

Question. A fuse is connected in ………. to the ………. wire.

Question. The alloy which is used for making the filament of bulbs is ………

Question. Power transmission is carried out at high ………. and low …….. .

Question. Rate at which electric work is done is called ………

Question. Copper is a preferred material for making wire because of its low ……….

Question. The electrical energy dissipated in a resistor is given by W = ……….

Question. The ………. reaction within the cell generates the potential difference between its two terminals that sets the ………. in motion to flow the current through a resistor.

Question. The resistance of a semiconductor …….. with increase in temp.  

True / False :

Question. One kilowatt is equal to 10 horse power.  

Question. The reciprocal of resistance is called specific

Question. The sun is visible two minutes before the actual sunrise due to atmospheric refraction.

Question. The focal length of a given lens depends on the surrounding medium.

Question. The resistivity of a wire is directly proportional to cross-sectional area.

Question. One kilowatt is equal to 10 horse power.

Question. The solar spectrum in general is an absorption spectrum.

Question. Ohm’s law is a relation between the power used in a circuit to the current and the potential difference.

Question. When a metallic conductor is heated the atoms in the metal vibrate with greater amplitude and frequency.

Question. The resistivity of all pure metals increases with the rise in temperature.

Question. In parallel combination, the reciprocal of equivalent resistance is the sum of the reciprocal of individual resistance.

Question. The resistance of a wire is directly proportional to area.  

Question. When a metallic conductor is heated the atoms in the metal vibrate with greater amplitude and frequency.   

Question. In parallel combination, the reciprocal of equivalent resistance is the sum of the reciprocal of individual resistance.  

Question. The quantity of charge flowing through a point multiplied by time is a current.  

Question. The resistance of a wire is directly proportional to length.  

Match the Following :

Question. Column II gives name of material use for device given i column I

Column I	Column II
(A) Resistance of resistance box	(p) R/2+6
(B) Resistance between a and c	(q) 5/8 R
(C) Resistance between b and d r	(r) R

Question.

Column I	Column II
1. Filament of electrical bulb	(a) Copper
2. Heating elements	(b) Lead-tin alloy
3. Connection wire	(c) Tungsten
4. Fuse wire	(d) Nichrome

Question.

Question.

Question. For the circuit shown in the adjoining figure, match the entries of column I with the entries of column II.

Question.

Question. In the figure shown, the value of each resistance is R. match the entries of column I with the entries of column II.

Column I	Column II
(A) Resistance between a and b	(p) R/2
(B) Resistance between a and c	(q) 5/8 R
(C) Resistance between b and d r	R

Question. Consider a network of resistances each of value of R as shown in figure.

Column I	Column II
(A) Equivalent of net work between A and C is	(p) same
(B) Equivalen t resistance between A and B	(q) 5/8 R
(C) Potential of B and D when voltage source is applied across A and C is	(r) R
(D) Potential of B and D when voltage source is applied across A and B is	(s) 2R

Question. Match the Following

Column I	Column II
(A) Ohm	(p) PL/A
(B) Resistance	(q) 1volt/1 ampere
(C) Resistivity	(r) zero resistance
(D) Super conductor	(s) ohm-meter

Question.

Column I	Column II
(A) Ohm	(p) ρL/A
(B) Resistance	(q) 1 volt/1 ampere
(C) Resistivity	(r) zero resistance
(D) Super conductor	(s) ohm-meter

Question. Column II gives name of material use for device given in column I

Column I	Column II
(A) Resistance of resistance box	(p) tungsten
(B) Fuse wire	(q) maganin
(C) Bulb	(r) tin-lead alloy
(D) Insulator	(s) glass