Loading [MathJax]/jax/element/mml/optable/BasicLatin.js

CBSE Questions for Class 10 Physics Electricity Quiz 10 - MCQExams.com

A solenoid is at potential of difference 60 V and current flows through it is 15 ampere, then the resistance of coil will be 
  • 4 Ω
  • 8 Ω
  • 0.25 Ω
  • 2 Ω
Match the Column I with Column II.

Column I
Column II
(A)Smaller the resistance greater the current in a circuit(p)If the same voltage is applied across a resistance
(B)Greater or smaller the resistance the current is same(q)If the same current is passed
(C)Greater the resistance, smaller the power(r)When resistances are connected in series
(D)Greater the resistance, greater the power(s)When resistances are connected in parallel
  • A-r, B-p, C-q, D-s
  • A-p, B-r, C-q, D-s
  • A-r, B-p, C-s, D-q
  • A-s, B-r, C-p, D-q
A metal plate can be heated by
  • passing either a direct or alternating current through the plate.
  • placing in a time varying magnetic field.
  • placing in a space varying magnetic field, but does not vary with time.
  • both (a) and (b) are correct
In parallel combination of n cells, we obtain:
  • More voltage
  • More current
  • Less voltage
  • Less current
If two bulbs of 25W and 100W rated at 200 volts are connected in series across a 440 volts supply, then
  • 100 watt bulb will fuse
  • 25 watt bulb will fuse
  • none of the bulb will fuse
  • both the bulbs will fuse
The resistance of the series combination of two resistance is S. When they are joined in parallel through total resistance is P. If S=nP, then the minimum possible value of n is?
  • 4
  • 3
  • 2
  • 1
If n cells each of emf ε and internal resistance r are connected in parallel, then the total emf and internal resistances will be:
  • ε,rn
  • ε,nr
  • nε,rn
  • nε,nr
In the series combination of n cells each cell having emf ε and internal resistance r. If three cells are wrongly connected, then total emf and internal resistance of this combination will be.
  • nε,(nr3r)
  • (nε2ε),nV
  • (nε4ε),nV
  • (nε6ε),nV
Refer to teh circuit shown. What will be the total power dissipation in the circuit if P is the power dissipated in R1? It is given that R2=4R1 and R3=12R1
1028158_9490e31283ea4eb58a741eee56a3ca02.png
  • 4P
  • 7P
  • 13P
  • 17P
In the circuit shown in the figure E1=7V,E2=7V,R1=R2=1Ω,R3=3Ω. The current through the resistance R3 and potential difference between the (+)ve terminal of one battery and the (-ve) terminal of second battery are
1016810_30ec869becc1483ca18896a26c86afa5.PNG
  • i=0
  • i=2A
  • V=14V
  • V=7V
The current in the given circuit will be:
1033442_fe5eaa715c9e46dfae44f5b861f1e685.PNG
  • 145 ampere
  • 115 ampere
  • 110 ampere
  • 15 ampere
In the network shown in the figure, the equivalent resistance between A and C is
1016681_b7aa521a15f14405bbe739029fc0ed49.PNG
  • 10R
  • (6/11)R
  • (12/15)R
  • (50/11)R
A wire of resistance 'R' is cut into 'n' equal parts. These parts are then connected in parallel with each other. The equivalent resistance of the combination is:
  • nR
  • Rn
  • Rn2
  • n2R
Three resistance R,2R and 3R are connected in parrallel to a battery ,then
  • The potential drop across 3R is maximum
  • The current through each resistance is same
  • The heat developed in 3R is maximum
  • The heat developed in R is maximum

 The net resistance between X and Y is 


1049490_c7523a3a990d41cebc25fd75a3360e8f.PNG
  • 4Ω 
  • 4.55Ω 
  • 2Ω
  • 20Ω
In the following part of the circuit, potential difference between points A and B equals to
1044296_2c02cbddbd7942879828216b3efdc693.png
  • 30V
  • 45V
  • 15V
  • 45V
Two wires of same dimensions but resistivities ρ1 and ρ2 are connected in series. The equivalent resistivity of the combination is:
  • ρ1+ρ2
  • 12(ρ1+ρ2)
  • ρ1ρ2
  • 2(ρ1+ρ2)
The equivalent resistance between the points A and B is:
1051516_f4398cde6ccd4545b38834dafe31a59d.PNG
  • 367Ω
  • 10Ω
  • 857Ω
  • none of these
In the circuit shown in figure, the ammeter reads a current of?
1046330_283d80e8315d4a39935fb4f03cfca255.PNG
  • 1A
  • 2A
  • 0.3A
  • 0.2A
The current through the ammeter shown in the figure is 109A. If each of the 4Ω resistor is replaced by 2Ω resistor, the current in the circuit will become 
1059913_cd2d9201e4d04466b7fd762faed06f7c.png
  • (a)109A
  • (b)54A
  • (c)98A
  • (d)58A

Resistors R1 and R2 have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be:


1067633_df7dc346f9db40ef9ad5c903f106f903.PNG
  • 1
  • 5
  • 8
  • 4
An electric motor operates on a 50 V supply and a current of 1 A. If the efficiency of the motion is 30 %, what is the resistance of winding of motion ?
  • 35 Ω
  • 4 Ω
  • 2.9 Ω
  • 3.1 Ω
9 Identical wires each of Resistance R are connected to form a closed polygon. The equivalent resistance between the ends of any side is
  • 9R
  • R/9
  • 8R/9
  • 9R/8
In the given circuit the current through the cell is:
1079515_2ee00939ab514e1cb3c95db9f884b636.png
  • 43A
  • 53A
  • 13A
  • 23A
If the resistance in the circuit is increased four times by keeping the potential difference the same, the current in the circuit is ___________.
  • Remains same
  • Four times
  • One fourth
  • Half
Mohan uses one television of 100 W for 10 hrs. How much energy is consumed by Mohan?
  • E=100kWh
  • E=0.1kWh
  • E=1kWh
  • E=10kWh
Two bulbs take 50 watts each when connected in parallel to 100 V source. The total power consumed by them when they are connected in series with the same source is
  • 25 W
  • 50 W
  • 75 W
  • 100 W
Resistor R1 and R2 have an equivalent resistance of 6 Ω when connected in the circuit shown. The resistance of R1 could be (in Ω) (R1<R2)
1075508_cbfdaf5080924e59952723147b51c455.png
  • 1
  • 5
  • 8
  • 4
What will be the effective resistance between the points P and Q in the following circuit
1078220_6fb586a3cdab4df2ab44d013902b38b5.JPG
  • 13Ω
  • 2/3Ω
  • 2Ω
  • 7Ω
A block has dimensions 1 cm,2 cm and 3 cm. Ratio of the maximum resistance to minimum resistance between any pair of opposite faces of this block is:
  • 9:1
  • 1:9
  • 18:1
  • 1:6
Two wires A and B of same material and same mass have radius 2r and r and the length of the wire B is half the length of the wire  A. If resistance of wire A is 34\Omega, then resistance of B will be:
  • 544\Omega
  • 272\Omega
  • 68\Omega
  • 17\Omega
Find the current supplied by the battery as shown in the figure.
1088480_1a6b40598d7349df8663a02b060db620.png
  • 4
  • 5
  • 54
  • 3
The mains power supply of a house is through a 20 A fuse. When a 1500 W heater is used in this house, how many 100 W bulbs can be used simultaneously?(The supply is at 220 V and the appliances are rated for 220 V)
  • 27
  • 29
  • 30
  • 33
When three resistors of resistances 3\Omega ,4\Omega and 5\Omega are connected in parallel, the currents through them are in the ratio
  • 5:4:3
  • 20:15:12
  • 3:4:5
  • 9:8:7
Find equivalent resistance between A and B
1112119_80491d8aeaf443a5924d50eff99999c8.png
  • \dfrac{R}{4}
  • \dfrac{2R}{5}
  • \dfrac{3R}{5}
  • \dfrac{5R}{6}
When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become:-
  • Two times
  • Four times
  • Eight times
  • Sixteen times
The current in the given circuit will be :
1135303_1f10b08503b44900b6043b0f07c80df0.jpg
  • \dfrac{1}{45}A
  • \dfrac{1}{15}A
  • \dfrac{1}{10}A
  • \dfrac{1}{5}A
Two resistors R_1 \, (24 \pm 0.5) \Omega  and R_2 \, (8 \pm 0.3) \Omega are joined in series. The equivalent resistance is 
  • 32 \pm 0.33 \Omega
  • 32 \pm 0.8 \Omega
  • 32 \pm 0.2\Omega
  • 32 \pm 0.5 \Omega
Two resistors R_1 and R_2 are connected in parallel. The relative error in their equivalent resistance is [If R_1=(60\pm 3)\Omega and R_2=(30\pm 2)\Omega
  • \dfrac{1}{20}
  • \dfrac{1}{30}
  • \dfrac{11}{180}
  • \dfrac{7}{180}
Three resistances R_1,R_2 & R_3 (R_1> R_2> R_3) are connected in series. If current I_1,I_2 & I_3 respectively is flowing through them, the correct relation will be
  • I_1=I_2=I_3
  • I_1> I_2> I_3
  • I_1< I_2< I_3
  • I_1> I_2< I_3
The value equlvalent resistance between the points A and B in the given circuit will be?
1123906_749aeb9b99394efaa6f2c6ec33ac2926.png
  • 6\ R
  • \dfrac{4R}{11}
  • \dfrac{11R}{4}
  • \dfrac{R}{6}
If two resistances {R_1} = \left( {10.0 \pm 0.1} \right)\Omega \;and\;{R_2} = \left( {20.0 \pm 0.1} \right)\Omega \;are\;connected in series, then the maximum percentage error in its equivalent resistance will be
  • 1/5%
  • 2/3%
  • 2%
  • 4%
A uniform wire of resistance 36\ \Omega is bent in the form of a circle. The effective resistance across points A and B is___.
1199429_deb8e6b24eaa4c7d8b8634bfde458330.png
  • 5 \Omega
  • 6 \Omega
  • 7.2 \Omega
  • 30 \Omega
The lowest resistance which can be obtained by connecting 10 resistors each of \dfrac{1}{10}\Omega is
  • 1/250\ \Omega
  • 1/100\ \Omega
  • 1/200\ \Omega
  • 1/10\ \Omega
An electric bulb is rated 220\ V and 100\ W, when it is operated on 110\ V, the power consumed will be  
  • 100\ W
  • 75\ W
  • 50\ W
  • 25\ W
P. Q and R are three resistances. When P, Q and R are connected in parallel, their total resistance is 3 \Omega. When P and Q are connected in parallel their total resistance is 10/ 3\ \Omega. When P and R is connected in series, their total resistance is 15\ \Omega. Find the correct value for P, Q and R.
  • P \rightarrow 5 \Omega ; Q \rightarrow 30 \Omega ; R \rightarrow 10 \Omega
  • P \rightarrow 8 \Omega ; Q \rightarrow 10 \Omega ; R \rightarrow 7 \Omega
  • P \rightarrow 5 \Omega ; Q \rightarrow 10 \Omega ; R \rightarrow 10 \Omega
  • P \rightarrow 5 \Omega ; Q \rightarrow 10 \Omega ; R \rightarrow 30 \Omega
Equivalence Resistance?
1217708_af8f6314052c4002b2c2d9ff58edae05.png
  • 2R
  • 5R
  • 3R
  • 7R
When 25 A current with 10 ohm resistance flowing per second then the power lost in the cable during transmission is
  • 12.5 kW
  • 6.25 kW
  • 25 kW
  • 3.15 kW
In the network atom in figure, the equivalent resistance between the  point A and B is :-


1217668_da56bbe60e824d5cb1b372e9c4e8f262.png
  • 3 \ \Omega
  • 2 \ \Omega
  • 4 \ \Omega
  • 1 \ \Omega
 Two copper wires are of same length one of the twice as thick as the other. Then the resistance of the two wires are in the ratio of :
  • 1:16
  • 1:8
  • 1:4
  • 1:2
0:0:3


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 10 Physics Quiz Questions and Answers