Explore topic-wise MCQs in Physics.

This section includes 132 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

In an electric circuit shown below the direction of current is taken from

A. as shown in (i)
B. as shown in (ii)
C.  3
D. None of the above is correct
Answer» C.  3
Discussion
2.

Three equal resistors connected in series across a source of e. m. f. together dissipate 10 watt of power. What would be the power dissipated if the same resistors are connected in parallel across the same source of e. m. f?

A.  90 watts  
B.  80 watts
C. Four times
D.  75 watts
Answer» B.  80 watts
Discussion
3.

DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion A: Air is an insulator. Reason (R): Those materials that do not allow electric current to pass through them are called insulators.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. 25 to 30 days    
D. A is false but R is true.
Answer» B. Both A and R are true but R is not the correct explanation of A.
Discussion
4.

Conversion of heat into electrical energy may be achieved by using

A.  hydrometer
B.  thermocouple  
C. Japan 
D.  photo-electric effect
Answer» C. Japan 
Discussion
5.

If an electric iron draws a current of 4 A when connected to a 220 V mains, then its resistance must be

A.  \[1000\Omega \] 
B.  \[44\Omega \]
C. A is true but R is false.
D.  none of these
Answer» D.  none of these
Discussion
6.

Inside a cell current flows from

A. positive terminal to negative terminal
B. negative terminal to positive terminal
C. Khadi    
D. either (a) or (b)
Answer» C. Khadi    
Discussion
7.

Work done in moving an electric charge q in an electric field does not depend upon

A.  magnitude of the charge
B.  potential difference between two points
C.  Both the above
D.  all of these
Answer» D.  all of these
Discussion
8.

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage -1 Those materials which do not allows electric current to pass through them are called insulators e.g., air, cork, rubber, thermocole, paper, etc. Insulators are used for covering electrical wires, plug tops, switches and other parts of electrical appliances. Air is an insulator of electricity because air have no-

A. electrons   
B. free electrons
C. Tolerance to climate conditions
D.  None of these
Answer» C. Tolerance to climate conditions
Discussion
9.

The emf produced in a wire by its motion across a magnetic field does not depend upon

A.  length of the wire
B.  composition of the wire  
C. Selective breeding 
D.  orientation of the wire
Answer» C. Selective breeding 
Discussion
10.

Select the correct statement:

A. Electrical sockets are made up of conductors, while plug tops are made up of insulators
B. Electrical sockets are made up of insulators, while plug tops are made up of conductors
C.  Handloom 
D. Fuse wires are made up of conductors, while bulb filament is made up of insulators
Answer» D. Fuse wires are made up of conductors, while bulb filament is made up of insulators
Discussion
11.

A person working as line man with electricity department is advised not to handle electric wires with bare hands and always bear rubber gloves while working with electric wires. This advice is given because

A. he will get electrocuted if he handles live electric wires with bare hands
B. the rubber gloves being insulators will protect him from electric shocks
C.  Angora rabbits
D. Both (a) and (b)
Answer» E.
Discussion
12.

A magnetic field cannot exert any force on a

A.  moving magnet  
B.    moving charge  
C. Tassar     
D.  stationary charge 
Answer» E.
Discussion
13.

If a resistance 5Q is connected in the left gap of a meter bridge and 15Q in the other gap then position of balancing point is

A.  10 cm
B.  20 cm
C. Grading
D.  75 cm
Answer» D.  75 cm
Discussion
14.

Which material is the best conductor of electricity?

A. metal  
B.   glass
C.  Wool  
D.  plastic
Answer» B.   glass
Discussion
15.

The symbol of an open switch is shown in

A. figure (i)
B. figure (ii)
C. dyeing the cocoon 
D. None of the above is correct
Answer» D. None of the above is correct
Discussion
16.

In comparing e. m. f. of two cells with the help of a potentiometer, at the balance point, the parent flowing through the wire is taken from

A.  one of these cells
B.  both of these cells
C.  When the plant is at flowering stage
D.  none of these
Answer» D.  none of these
Discussion
17.

DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion A: In a closed electric circuit the current passes from one terminal of the electric cell to the other terminal. Reason (R): Generally the metal disc of a cell acts as positive terminal.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C.  Both weaving and knitting
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
18.

A tap supplies water at \[22{}^\circ C\]. Aman takes 11 litre water per minute at \[37{}^\circ C\] from the geyser is  The power of geyser is

A.  525 W    
B.  1050 W  
C. Wool industry   
D.  2100 W
Answer» C. Wool industry   
Discussion
19.

What is the equivalent resistance between points A and B in the given circuit diagram?

A. \[\frac{4}{3}r\]
B. \[\frac{10}{3}r\]
C.  Thread 
D. \[10r\]
Answer» C.  Thread 
Discussion
20.

Match the column I with column II and select the correct option from the codes given.Column I  Column II(a) Electric current  (i)   volt(b) E.m.f.(ii) ohm(c) Resistance (iii) ohm-metre(d) Resistivity(iv) ampere 

A. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
B. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C. Kashmiri goat   
D. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
Answer» D. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
Discussion
21.

An air conditioner is rated 260 V, 2.0 kW. The air conditioner is switched on for 10 hours each day. What is electrical energy consumed in 30 days?

A. 20 kW h   
B. 2000 kW h  
C. heart   
D. 420 kW h
Answer» D. 420 kW h
Discussion
22.

A \[10\,\Omega \] resistance wire AB of length 2 m is connected in a circuit as shown below. What is the reading on the voltmeter when the jockey is at point C?

A. 1.6 V   
B. 2.4 V   
C.  Fibre  
D. 12 V
Answer» D. 12 V
Discussion
23.

A How much current is drawn by a bulb rated 100 W and designed for a mains supply of 250 V when operated normally? 

A. 0.20 A  
B. 0.40 A    
C. extended family
D. 0.80 A
Answer» C. extended family
Discussion
24.

How many terminals does a bulb has?

A. 1 
B.  2
C. Nuclear family
D.  4
Answer» C. Nuclear family
Discussion
25.

Electric wires are covered with

A. a conducting material
B. insulators
C. mother  
D. None of these
Answer» C. mother  
Discussion
26.

A wire of resistance R is doubled by stretching. What will be the resistance of half of this stretched wire?

A. \[\frac{R}{2}\]
B. R
C. flowers  
D. 4R
Answer» D. 4R
Discussion
27.

A suitable unit for expressing the strength of electric field is

A.  V/C  
B.  C/m
C. can't say
D.  C/N
Answer» B.  C/m
Discussion
28.

In a meter bridge, a standard resistor of R ohm is connected in the left gap and two wires A and B are connected one after the other in the right gap. The balancing length measured from the left is 50 cm for either of them. If the two wires are connected is series and put in the right gap, the balancing length measured from the left would be (in cm)

A.  25  
B. \[~\text{33}\text{.3}\]
C.  70 watts
D.  75
Answer» B. \[~\text{33}\text{.3}\]
Discussion
29.

A cell of emf E volts with no internal resistance is connected to a wire of uneven cross-sectional area. The wire has three sections of equal length. The radius of the middle section is a and the other are 2 a. The ratio of the potential difference across the middle section to any other section is

A.  2 :1 
B.  4 : 1  
C. A is true but R is false.
D.  1 : 4
Answer» C. A is true but R is false.
Discussion
30.

The plot represents the flow of current through a wire at three different time intervals. The ratio of charges flowing  through the wire at different intervals is

A. 0.043090277777778
B. 0.0423726851851852
C.  voltmeter
D. 2 : 3 : 3
Answer» C.  voltmeter
Discussion
31.

Consider a thin square sheet of side x and thickness y made of a material of resistivity \[\rho \]. The resistance between two opposite faces, shown by the shaded areas in the figure is

A. Directly proportional to x
B. Directly proportional to y
C.  \[55\Omega \]  
D. Independent of y.
Answer» D. Independent of y.
Discussion
32.

What is the current 3t point X in the circuit shown below?

A. 1 A    
B. 0.083333333333333
C. positive terminal to positive terminal
D. 0.16666666666667
Answer» C. positive terminal to positive terminal
Discussion
33.

In an electrolysis experiment a current C passes through two different cells in series, one containing a solution of copper sulphate and the other a solution of silver nitrate. The ratio of increase of the weights at cathode in the two cells will be

A.  in the ratio of the atomic weights of copper and silver
B.  in the ratio of the density of copper and silver
C.  mass of the particle  
D.  in the ratio of half the atomic weight of copper to half the atomic weight of silver
Answer» D.  in the ratio of half the atomic weight of copper to half the atomic weight of silver
Discussion
34.

Which part of the electric bulb gives off light, when the bulb is switched on?

A. Positive terminal   
B. Negative terminal
C. protons 
D. None of these
Answer» D. None of these
Discussion
35.

The internal resistance of a primary cell is 4 ohm. It generates a current of 0.2 ampere in an external resistance of 2 ohm. The rate at which chemical energy is consumed in providing the current is

A.  \[0.42\,J\text{/}s\]
B.  \[0.24\,J\text{/}s\]  
C.  speed of the wire
D.  \[1\,J\text{/}s\]
Answer» C.  speed of the wire
Discussion
36.

A 200 W and a 100 W bulbs, both meant for operation at 220 V, are connected in series, to a 220 V supply. The power consumed by them will be

A.  33 W   
B.  66 W  
C. Wire coverings are made up of conductors, while fuse wires are made up of insulators
D.  300 W
Answer» C. Wire coverings are made up of conductors, while fuse wires are made up of insulators
Discussion
37.

A battery of 6 V is connected to the terminals of three metre long wire of uniform thickness and resistance of the order of 100 ohms. The difference of potential between two points separated by 50 cm on the wire will be

A.  1 volt  
B.  \[\text{1}\text{.5}\]volts
C. the rubber gloves control the electric flow
D.  3 volts
Answer» B.  \[\text{1}\text{.5}\]volts
Discussion
38.

In the circuit shown here, the ammeter A reads 5 A and the voltmeter V reads 20 V. The correct value of resistance R is

A. Exactly \[4\Omega \]
B. Slightly greater than \[4\Omega \]
C.  25 cm  
D. Zero
Answer» C.  25 cm  
Discussion
39.

The resistors \[{{R}_{1}},{{R}_{2}},{{R}_{3}}\] and \[{{R}_{4}}\] in the given circuit are all equal in value and connected with a negligible resistance wire. Which of the following is correct relationship between the voltmeters readings \[{{V}_{1}},{{V}_{2}}\] and \[{{V}_{3}}\]

A. \[{{V}_{1}}={{V}_{2}}={{V}_{3}}\] 
B. \[{{V}_{1}}={{V}_{2}}>{{V}_{3}}\] 
C. wood   
D. \[{{V}_{1}}={{V}_{2}}<{{V}_{3}}\]
Answer» E.
Discussion
40.

Four resistors of \[2\,\,\Omega \] each are joined end to end to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent corners.

A. \[1.5\,\,\Omega \]   
B. \[3.0\,\,\Omega \]
C. both figure (i) and figure (ii)
D. \[6.0\,\,\Omega \]
Answer» B. \[3.0\,\,\Omega \]
Discussion
41.

In the circuit shown in figure, what will be the reading of the ammeter?

A.  \[0.36\,ampere\] 
B.  \[0.50\,ampere\]  
C.  the battery in the main circuit  
D.  \[4.5\,ampere\]
Answer» C.  the battery in the main circuit  
Discussion
42.

In the given figure, distance [d] between conductors carrying currents \[{{I}_{1}}\] and \[{{I}_{2}}\] is varied. Which of the following graphs correctly represents the variation of force (F) between the conductors and distance [d]?

A.  
B.  None of these
Answer» B.  None of these
Discussion
43.

Four bulbs marked 40 W, 250 V are connected in series with 250 V mains, the total power consumed is

A.  10 W  
B.  40 W
C.  1575 W 
D.  160 W
Answer» B.  40 W
Discussion
44.

Given three equal resistors. How many different combination of these three resistances can be made?

A.  Six
B.  Five
C. \[\frac{5}{3}r\]
D.  Three
Answer» D.  Three
Discussion
45.

10,000 alpha particles per minute are passing through a straight tube of radius r. The resulting electric current is approximately

A. \[0.5\times {{10}^{-16}}A\]  
B.  \[2\times {{10}^{12}}A\]
C. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
D.  \[2\times {{10}^{-12}}A\]
Answer» B.  \[2\times {{10}^{12}}A\]
Discussion
46.

There will be no force between two wires carrying currents if currents are

A.  parallel to each other
B.  antiparallel to each other
C. 600 kW h
D.  none of these
Answer» D.  none of these
Discussion
47.

Various distribution circuits are connected in

A.  series
B.  parallel  
C. 0.60 A  
D.  nothing can be decided
Answer» C. 0.60 A  
Discussion
48.

While carrying out an experiment, to find the equivalent resistance of two resistances connected in parallel, a student sets up the circuit as shown. The teacher checks it and tells him that his circuit has one or more of the following 'faults'. (i) The resistors \[{{R}_{1}}\] and \[{{R}_{2}}\] have no been correctly connected in parallel(ii) The voltmeter has not been correctly connected in the circuit(iii) The ammeter and the key have not been correctly connected in the circuit.Out of these three, the actual fault in hi circuit is/are

A. Both (i) and (ii)
B. Both (ii) and (iii)
C. 3 
D. (ii) only
Answer» B. Both (ii) and (iii)
Discussion
49.

Arrange the order of power dissipated in the given circuits, if the same current enters at point A in all the circuits and resistance of each resistor is R.

A. (ii) > (iii) > (iv) > (i)
B. (iii) > (ii) > (iv) > (i)
C. Both the above
D. (i) > (ii) > (iii) > (iv)
Answer» B. (iii) > (ii) > (iv) > (i)
Discussion
50.

Six equal resistances are connected between points P, Q and R as shown in the figure. The net resistance will be maximum between

A. P and Q   
B. Q and R
C. 2R 
D. Any two points.
Answer» B. Q and R
Discussion