MCQ 511 Mark
In the figure shown, the total resistance between $A$ and $B$ is
- A$12 \Omega$
- B$4 \Omega$
- C$6 \Omega$
- ✓$8 \Omega$
Answer
View full question & answer→Correct option: D.
$8 \Omega$
$8 \Omega$
Questions · Page 2 of 11
M.C.Q (1 Marks)
MCQ 521 Mark
In the circuit, the potential difference across $PQ$ will be nearest to
- A$9.6 V$
- B$6.6 V$
- C$4.8 V$
- ✓$3.2 V$
Answer
View full question & answer→Correct option: D.
$3.2 V$
$3.2 V$
MCQ 531 Mark
The current between $B$ and $D$ in the given figure is
- A$1\ amp$
- B$2\ amp$
- ✓Zero
- D$0.5\ amp$
Answer
View full question & answer→Correct option: C.
Zero
Zero
MCQ 541 Mark
In hydrogen atom, the electron makes $6.6 \times 10^{15}$ revolutions per second around the nucleus in an orbit of radius $0.5 \times 10^{-10} m$. It is equivalent to a current nearly
- A$1 A$
- ✓$1 mA$
- C$1 \mu A$
- D$1.6 \times 10^{-19} A$
Answer
View full question & answer→Correct option: B.
$1 mA$
$1 mA$
MCQ 551 Mark
The equivalent resistance between $P$ and $Q$ in the given figure, is
- A$50 W$
- B$40 W$
- C$30 W$
- ✓$20 W$
Answer
View full question & answer→Correct option: D.
$20 W$
$20 W$
MCQ 561 Mark
The graph which represents the relation between the total resistance $R$ of a multi range moving coil voltmeter and its full scale deflection $V$ is
- A$(i)$
- B$(ii)$
- C$(iii)$
- ✓$(iv)$
Answer
View full question & answer→Correct option: D.
$(iv)$
$(iv)$
MCQ 571 Mark
Two wires of equal diameters, of resistivities $\rho_1 $ and $\rho_2$ and lengths $\mathrm{I}_1$ and $\mathrm{I}_2$, respectively, are joined in series. The equivalent resistivity of the combination is
- ✓$\frac{\rho_1 1_1+\rho_2 1_2}{1_1+1_2}$
- B$\frac{\rho_1 l_2+\rho_2 l_1}{l_1-l_2}$
- C$\frac{\rho_1 l_2+\rho_2 l_1}{l_1+l_2}$
- D$\frac{\rho_1 l_1-\rho_2 l_2}{l_1-l_2}$
Answer
View full question & answer→Correct option: A.
$\frac{\rho_1 1_1+\rho_2 1_2}{1_1+1_2}$
$\frac{\rho_1 1_1+\rho_2 1_2}{1_1+1_2}$
MCQ 581 Mark
Potential difference between the points $P$ and $Q$ in the electric circuit shown is
- A$4.5 V$
- B$1.2 V$
- C$2.4 V$
- ✓$2.88 V$
Answer
View full question & answer→Correct option: D.
$2.88 V$
$2.88 V$
MCQ 591 Mark
Eels are able to generate current with biological cells called electroplaques. The electroplaques in an eel are arranged in $100$ rows, each row stretching horizontally along the body of the fish containing $5000$ electroplaques. The arrangement is suggestively shown below. Each electroplaques has an emf of $0.15 V$ and internal resistance of $0.25 W$
The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of $500 W,$ the current an eel can produce in water is about
The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of $500 W,$ the current an eel can produce in water is about
- ✓$1.5 A$
- B$3.0 A$
- C$15 A$
- D$30 A$
Answer
View full question & answer→Correct option: A.
$1.5 A$
$1.5 A$
MCQ 601 Mark
Equal potentials are applied on an iron and copper wire of same length. In order to have the same current flow in the two wires, the ratio $r\ ($iron$)\ / r\ ($copper$)$ of their radii must be $($Given that specific resistance of iron $=1.0 \times 10^{-7}$ ohm$-m$ and specific resistance of copper $=1.7 \times 10^{-8}$ ohm$-m)$
- AAbout $1.2$
- ✓About $2.4$
- CAbout $3.6$
- DAbout $4.8$
Answer
View full question & answer→Correct option: B.
About $2.4$
About $2.4$
MCQ 611 Mark
In the circuit shown below, The reading of the voltmeter $V$ is
- ✓$12 V$
- B$8 V$
- C$20 V$
- D$16 V$
Answer
View full question & answer→Correct option: A.
$12 V$
$12 V $
MCQ 621 Mark
The potential difference across $8$ ohm resistance is $48$ volt as shown in the figure. The value of potential difference across $X$ and $Y$ points will be
- ✓$160$ volt
- B$128$ volt
- C$80$ volt
- D$62$ volt
Answer
View full question & answer→Correct option: A.
$160$ volt
$160$ volt
MCQ 631 Mark
Potential difference across the terminals of the battery shown in figure is $(r =$ internal resistance of battery$)$
- A$8 V$
- B$10 V$
- C$6 V$
- ✓Zero
Answer
View full question & answer→Correct option: D.
Zero
Zero
Question 641 Mark
The V-i graph for a conductor makes an angle θ with V-axis. Here V denotes the voltage and i denotes current. The resistance of conductor is given by(a) sin θ(b) cos θ(c) tan θ (d) cot θ
Answer
View full question & answer→(d) cot θ
Question 651 Mark
Assertion : A person touching a high power line gets stuck with the line.
Reason : The current carrying wires attract the man towards it.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : The current carrying wires attract the man towards it.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Answer
View full question & answer→(d) If the assertion and reason both are false.
MCQ 661 Mark
The reading of the ideal voltmeter in the adjoining diagram will be
- A$4 V$
- ✓$8 V$
- C$12 V$
- D$14 V$
Answer
View full question & answer→Correct option: B.
$8 V$
$8 V$
MCQ 671 Mark
For what value of $R$ the net resistance of the circuit will be $18$ ohms
- A$8 \Omega$
- B$10 \Omega$
- ✓$16 \Omega$
- D$24 \Omega$
Answer
View full question & answer→Correct option: C.
$16 \Omega$
$16 \Omega$
MCQ 681 Mark
The magnitude and direction of the current in the circuit shown will be
- A$\frac{7}{3} A$ from $a$ to $b$ through $e$
- B$\frac{7}{3} A$ from $b$ to $a$ through $e$
- C$1 A$ from $b$ to $a$ through $e$
- ✓$1 A$ from $a$ to $b$ through $e$
Answer
View full question & answer→Correct option: D.
$1 A$ from $a$ to $b$ through $e$
$1 A$ from $a$ to $b$ through $e$
MCQ 691 Mark
The current in the following circuit is
- A$\frac{1}{8} \mathrm{~A}$
- B$\frac{2}{9} A$
- C$\frac{2}{3} A$
- ✓$1 A$
Answer
View full question & answer→Correct option: D.
$1 A$
$1 A$
MCQ 701 Mark
Which of the adjoining graphs represents ohmic resistance
- ✓
- B
- C
- D
Answer
View full question & answer→Correct option: A.
MCQ 711 Mark
In the circuit shown in figure reading of voltmeter is $V_1$ when only $S_1$ is closed, reading of voltmeter is $V_2$ when only $S_2$ is closed and reading of voltmeter is $V_3$ when both $S_1$ and $S_2$ are closed. Then
- A$V_3 > V_2 > V_1$
- ✓$V_2 > V_1 > V_3$
- C$V_3 > V_1 > V_2$
- D$V_1 > V_2 > V_3$
Answer
View full question & answer→Correct option: B.
$V_2 > V_1 > V_3$
$V_2 > V_1 > V_3$
MCQ 721 Mark
$V-i$ graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combination
- ✓$A$
- B$B$
- C$A$ and $B$ both
- DNeither $A$ nor $B$
Answer
View full question & answer→Correct option: A.
$A$
$A$
MCQ 731 Mark
In order to quadruple the resistance of a uniform wire, a part of its length was uniformly stretched till the final length of the entire wire was $1.5$ times the original length, the part of the wire was fraction equal to
- ✓$1 / 8$
- B$1 / 6$
- C$1 / 10$
- D$1 / 4$
Answer
View full question & answer→Correct option: A.
$1 / 8$
$1 / 8$
MCQ 741 Mark
In the given figure, battery $E$ is balanced on $55 \ cm$ length of potentiometer wire but when a resistance of $10\Omega$ is connected in parallel with the battery then it balances on $50 \ cm$ length of the potentiometer wire then internal resistance $r$ of the battery is
- ✓$1\Omega$
- B$3\Omega$
- C$10\Omega$
- D$5\Omega$
Answer
View full question & answer→Correct option: A.
$1\Omega$
$1\Omega$
MCQ 751 Mark
In the Wheatstone's bridge $($shown in figure$) X = Y$ and $A > B.$ The direction of the current between $ab$ will be
- AFrom $a$ to $b$
- ✓From $b$ to $a$
- CFrom $b$ to a through $c$
- DFrom a to $b$ through $c$
Answer
View full question & answer→Correct option: B.
From $b$ to $a$
From $b$ to $a$
MCQ 761 Mark
In the circuit given $E = 6.0 V, R_1 = 100\ ohms, R_2 = R_3 = 50\ ohms, R_4 = 75\ ohms$. The equivalent resistance of the circuit, in $ohms,$ is
- A$11.875$
- B$26.31$
- ✓$118.75$
- DNone of these
Answer
View full question & answer→Correct option: C.
$118.75$
$118.75$
MCQ 771 Mark
In the circuit shown in figure, the current drawn from the battery is $4A.$ If $10\Omega$ resistor is replaced by $20\Omega$ resistor, then current drawn from the circuit will be
- A$1\ A$
- B$2\ A$
- C$3\ A$
- ✓$0\ A$
Answer
View full question & answer→Correct option: D.
$0\ A$
$0\ A$
MCQ 781 Mark
In a typical Wheatstone network, the resistances in cyclic order are $A = 10\Omega, B = 5\Omega, C = 4\Omega$ and $D = 4\Omega$ for the bridge to be balanced
- ✓$10\Omega$ should be connected in parallel with $A$
- B$10\Omega$ should be connected in series with $A$
- C$5\Omega$ should be connected in series with $B$
- D$5\Omega$ should be connected in parallel with $B$
Answer
View full question & answer→Correct option: A.
$10\Omega$ should be connected in parallel with $A$
$10\Omega$ should be connected in parallel with $A$
MCQ 791 Mark
A battery of $emf \ 10 V$ and internal resistance $3 \Omega$ is connected to a resistor as shown in the figure. If the current in the circuit is $0.5 A .$ then the resistance of the resistor will be
- A$19 \Omega$
- ✓$17 \Omega$
- C$10 \Omega$
- D$12 \Omega$
Answer
View full question & answer→Correct option: B.
$17 \Omega$
$17 \Omega$
MCQ 801 Mark
In the figure, current through the $3 \Omega$ resistor is $0.8$ ampere, then potential drop through $4 \Omega$ resistor is
- A$9.6 V$
- B$2.6 V$
- ✓$4.8 V$
- D$1.2 V$
Answer
View full question & answer→Correct option: C.
$4.8 V$
$4.8 V$
MCQ 811 Mark
In the network of resistors shown in the adjoining figure, the equivalent resistance between $A$ and $B$ is
- A$54$ ohm
- B$18$ ohm
- C$36$ ohm
- ✓$9$ ohm
Answer
View full question & answer→Correct option: D.
$9$ ohm
$9$ ohm
MCQ 821 Mark
The equivalent resistance of the arrangement of resistances shown in adjoining figure between the points $A$ and $B$ is
- A$6$ ohm
- ✓$8$ ohm
- C$16$ ohm
- D$24$ ohm
Answer
View full question & answer→Correct option: B.
$8$ ohm
$8$ ohm
MCQ 831 Mark
Resistances of $6$ ohm each are connected in the manner shown in adjoining figure. With the current $0.5$ ampere as shown in figure, the potential difference $V_P - V_Q$ is
- A$3.6 V$
- B$6.0 V$
- ✓$3.0 V$
- D$7.2 V$
Answer
View full question & answer→Correct option: C.
$3.0 V$
$3.0 V$
MCQ 841 Mark
A battery of $\text{e.m.f.}\ E$ and internal resistance $r$ is connected to a variable resistor $R$ as shown here. Which one of the following is true
- APotential difference across the terminals of the battery is maximum when $R = r$
- ✓Power delivered to the resistor is maximum when $R = r$
- CCurrent in the circuit is maximum when $R = r$
- DCurrent in the circuit is maximum when $R >> r$
Answer
View full question & answer→Correct option: B.
Power delivered to the resistor is maximum when $R = r$
Power delivered to the resistor is maximum when $R = r$
MCQ 851 Mark
If each of the resistance of the network shown in the figure is $R,$ the equivalent resistance between $A$ and $B$ is
- A$5 R$
- B$3 R$
- ✓$R$
- D$R/2$
Answer
View full question & answer→Correct option: C.
$R$
$R$
MCQ 861 Mark
Two resistance wires on joining in parallel the resultant resistance is $\frac{6}{5}$ ohms. One of the wire breaks, the effective resistance is $2$ ohms. The resistance of the broken wire is
- A$\frac{3}{5}$ ohm
- B$2$ ohm
- C$\frac{6}{5}$ ohm
- ✓$3$ ohm
Answer
View full question & answer→Correct option: D.
$3$ ohm
$3$ ohm
MCQ 871 Mark
An infinite sequence of resistance is shown in the figure. The resultant resistance between $A$ and $B$ will be, when $R_1=1$ ohm and $R _2=2$ ohm
- AInfinity
- B$1 \Omega$
- ✓$2 \Omega$
- D$1.5 \Omega$
Answer
View full question & answer→Correct option: C.
$2 \Omega$
$2 \Omega$
MCQ 881 Mark
If you are provided three resistances $2 W, 3 W$ and $6 W$. How will you connect them so as to obtain the equivalent resistance of $4 W$
- A
- B
- ✓
- DNone of these
Answer
View full question & answer→Correct option: C.
MCQ 891 Mark
The n rows each containing $m$ cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of $3\Omega$ resistance. If the total number of cells used are $24$ and internal resistance of each cell is $0.5\Omega$ then
- A$m = 8, n = 3$
- B$m = 6, n = 4$
- ✓$m= 12, n = 2$
- D$m = 2, n = 12$
Answer
View full question & answer→Correct option: C.
$m= 12, n = 2$
$m= 12, n = 2$
MCQ 901 Mark
An unknown resistance $R_1$ is connected in series with a resistance of $10 W$. This combinations is connected to one gap of a metre bridge while a resistance $R_2$ is connected in the other gap. The balance point is at $50 \ cm$. Now, when the $10 W$ resistance is removed the balance point shifts to $40 \ cm$. The value of $R_1$ is $($in $ohm)$
- A$60.$
- B$40$
- ✓$20$
- D$10$
Answer
View full question & answer→Correct option: C.
$20$
$20$
MCQ 911 Mark
In the figure given below, the current passing through $6 \Omega$ resistor is
- A$0.40$ ampere
- ✓$0.48$ ampere
- C$0.72$ ampere
- D$0.80$ ampere
Answer
View full question & answer→Correct option: B.
$0.48$ ampere
$0.48$ ampere
MCQ 921 Mark
A $3$ volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current $I,$ in the circuit will be
- A$1/3 A$
- B$1 A$
- ✓$1.5 A$
- D$2 A$
Answer
View full question & answer→Correct option: C.
$1.5 A$
$1.5 A$
MCQ 931 Mark
The equivalent resistance of the following infinite network of resistances is
- ALess than $4 \Omega$
- B$4 \Omega$
- ✓More than $4 \Omega$ but less than $12 \Omega$
- D$12 \Omega$
Answer
View full question & answer→Correct option: C.
More than $4 \Omega$ but less than $12 \Omega$
More than $4 \Omega$ but less than $12 \Omega$
MCQ 941 Mark
What is the equivalent resistance of the circuit
- A$6 \Omega$
- B$7 \Omega$
- ✓$8 \Omega$
- D$9 \Omega$
Answer
View full question & answer→Correct option: C.
$8 \Omega$
$8 \Omega$
MCQ 951 Mark
The equivalent resistance between $x$ and $y$ in the circuit shown is
- ✓$10\ W$
- B$40\ W$
- C$20\ W$
- D$\frac 52\Omega$
Answer
View full question & answer→Correct option: A.
$10\ W$
$10\ W$
MCQ 961 Mark
What is the equivalent resistance between $A$ and $B$
- A$\frac{2}{3} R$
- B$ \frac{3}{2} R$
- ✓$ \frac{R}{2}$
- D$2R$
Answer
View full question & answer→Correct option: C.
$ \frac{R}{2}$
$ \frac{R}{2}$
MCQ 971 Mark
A student has $10$ resistors of resistance $' r\ '.$ The minimum resistance made by him from given resistors is
- A$10 r$
- ✓$\frac{ F }{10}$
- C$\frac{ r }{100}$
- D$\frac{ r }{5}$
Answer
View full question & answer→Correct option: B.
$\frac{ F }{10}$
$\frac{ F }{10}$
Question 981 Mark
Masses of 3 wires of same metal are in the ratio 1 : 2 : 3 and their lengths are in the ratio 3 : 2 : 1. The electrical resistances are in ratio(a) 1 : 4 : 9(b) 9 : 4 : 1(c) 1 : 2 : 3(d) 27 : 6 : 1
Answer
View full question & answer→(d) 27 : 6 : 1
Question 991 Mark
Which of the following is vector quantity(a) Current density(b) Current(c) Wattless current(d) Power
Answer
View full question & answer→(a) Current density
Question 1001 Mark
The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then(a) The resistance will be doubled and the specific resistance will be halved(b) The resistance will be halved and the specific resistance will remain unchanged(c) The resistance will be halved and the specific resistance will be doubled(d) The resistance and the specific resistance, will both remain unchanged
Answer
View full question & answer→(b) The resistance will be halved and the specific resistance will remain unchanged