27 + Interview Questions in ELECTRIC-CURRENT-&-CIRCUITS IN GENERAL AWARENESS Page 1 InterviewSolution

1.	In the above question, the resistance between the square faces isA. `3 xx 10^(-9)Omega`B. `3 xx 10^(-7)Omega`C. `3 xx 10^(-5)Omega`D. `3 xx 10^(-3)Omega`
Answer» Correct Answer - D

Discussion

2.	Two resistance `R_(1)` and `R_(2)` are made of different material. The temperature coefficient of the material of `R_(1)` is `alpha` and of the material of `R_(2)` is `-beta`. Then resistance of the series combination of `R_(1)` and `R_(2)` will not change with temperature, if `R_(1)//R_(2)` will not change with temperature if `R_(1)//R_(2)` equalsA. `alpha/beta`B. `(alpha+beta)/(alpha-beta)`C. `(alpha^(2) + beta^(2))/(alphabeta)`D. `beta/alpha`
Answer» Correct Answer - D

Discussion

3.	An ionization chamber with parallel conducting plates as anode and cathode has `5 xx 10^(7)` electrons and the same number of singly-charged positive ions per `cm^(2)`. The electrons are moving at `0.4 m//s`. The current density from anode to cathodes `4 mu A//m^(2)`. The velocity of positive ions moving towards cathode isA. `0.4m//s`B. `16m//s`C. ZeroD. `0.1m//s`
Answer» Correct Answer - D

Discussion

4.	The total current supplied to the circuit by the battery is A. 1AB. 2AC. 4AD. 6A
Answer» Correct Answer - C

Discussion

5.	In the circuit as shown if the current drawn through battery is `0.5A`. Then A. Resistance R = `46Omega`B. Current through `20Omega` resistance is 0.1AC. Potential difference across the middle resistance is 2VD. Potential difference across the `20Omega` resistance is 4V
Answer» Correct Answer - A::B::C

Discussion

6.	Thirteen resistances each of resistance `R` ohm are connected in the circuit as shown in the figure below. The effective resistance between `A` and `B` is A. `2ROmega`B. `4R/3Omega`C. `2R/3Omega`D. `Romega`
Answer» Correct Answer - C

Discussion

7.	Current through XY of circuit shown is A. 1AB. 4AC. 2A from B to AD. 3A
Answer» Correct Answer - C

Discussion

8.	If each resistance in the figure is of `9Omega` then reading of ammeter is
Answer» Correct Answer - A

Discussion

9.	A current `I` is passing through a wire having two sections `P` and `O` of uniform diameters `d` and `d//2` respectively. If the mean drift velocity of electrons in section `P` and `Q` is denoted by `v_(P)` and `v_(Q)` respectively, thenA. `v_(P) = v_(Q)`B. `v_(P) = 1/2v_(Q)`C. `v_(p) = (1/4)v_(Q)`D. `v_(P) = 2v_(Q)`
Answer» Correct Answer - C

Discussion

10.	Two cells, having the same emf, are connected in series through an external resistance `R`. Cells have internal resistance `r_(1)` and `r_(2) (r_(1) gt r_(2))` respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of `R` isA. `r_(1) + r_(2)`B. `r_(1) - r_(2)`C. `(r_(1) + r_(2))/2`D. `(r-(1)-r_(2))/2`
Answer» Correct Answer - A

Discussion

11.	The current in the arm CD of the circuit will be A. `i_(1)`B. `i_(2) + i_(3)`C. `I_(1) + i_(3)`D. `i_(1)-i_(2)+i_(3)`
Answer» Correct Answer - A::B

Discussion

12.	If in the circuit shown below, the internal resistance of the battery is `1.5 Omega` and `V_(P)` and `V_(Q)` are the potential at `P` and `Q` respectively, what is the potential difference between the point `P` and `Q`?
Answer» Correct Answer - D

Discussion

13.	Is the motion of a charge across junction momentum conserving ? Why or why not ?
Answer» Correct Answer - no

Discussion

14.	Twelve cells each having the same e.m.f are connected in series and are kept to a closed box. Some of the cell are connected in reverse order .The battery is connected in series with an ammeter an external resistance `R` and two cells of the same type as an in the battery .The current when they and support each other is `3` ampere and current is `2` ampare when the two oppose each other. How many cells are connected in servese order ?A. 4B. 1C. 3D. 2
Answer» Correct Answer - B

Discussion

15.	As the switch `S` is closed in the circuit shown in figure, current passed through it is. A. 4.5AB. 6.0AC. 3.0AD. Zero
Answer» Correct Answer - A

Discussion

16.	Consider the circuit shown in the figure. The current `I_(3)` is equal to A. 5AB. 3AC. `-3A`D. `-5/6A`
Answer» Correct Answer - D

Discussion

17.	Seven resistance are connected as shown in the firgure. The equivalent resistance between `A` and `B` is A. `3Omega`B. `4Omega`C. `4.5Omega`D. `5Omega`
Answer» Correct Answer - B

Discussion

18.	What is the equivalent resistance between the points A and B of the network? A. `57/7Omega`B. `8Omega`C. `6Omega``57/3Omega`D.
Answer» Correct Answer - B

Discussion

19.	In the circuit of adjoining figure the current through `12 Omega` resister will be A. 1AB. 1/5AC. 2/5AD. 0A
Answer» Correct Answer - D

Discussion

20.	A wire has resistance of `24 Omega` is bent in the following shape. The effective resistance between A and B is A. `24Omega`B. `10Omega`C. `16/3Omega`D. None of these
Answer» Correct Answer - B

Discussion

21.	The `V-I` graphs of parallel and series combinations of two metallic resistors are shown in (Fig. 3.53). Which graph represents the parallel combinations ? .A. AB. BC. A and B bothD. Neither A nor B
Answer» Correct Answer - A

Discussion

22.	Find the equivalent resistance between terminals A and B. Each resistor is of resistance R.
Answer» Correct Answer - B::C

Discussion

23.	The two ends of a uniform conductor are joined to a cell of e.m.f. `E` and some internal resistance. Starting from the midpoint `P` of the conductor, we move in the direction of current and return to `P`. The potential `V` at every point on the path is plotted against the distance covered `(x)`. which of the following graphs best represent the resulting curve ?A. B. C. D.
Answer» Correct Answer - B

Discussion

24.	In the circuit shown, the value of each resistance is r , then equivalent resistance of circuit between points A and B will be
Answer» Correct Answer - D

Discussion

25.	The equivalent resistance between the points A and B is: A. `36/7Omega`B. `10Omega`C. `85/7Omega`D. none of these
Answer» Correct Answer - C

Discussion

26.	The resistance of a wire of iron is `10 ohm` and temperature coefficient of resistivity is `5 xx 10^-3//.^@C`, At `20^@C` it carries `30 mA` of current. Keeping constant potential difference between its ends. The temperature of the wire is raised to `120^@C`. The current in `mA` that flows in the wire now is.A. 20B. 15C. 10D. 40
Answer» Correct Answer - A

Discussion

27.	A cylindrical conductor has uniform cross-section. Resistivity of its material increase linearly from left end to right end. If a constant current is flowing through it and at a section distance x from left end, magnitude of electric field intensity is E , which of the following graphs is correctA. B. C. D.
Answer» Correct Answer - B

Discussion

Explore topic-wise InterviewSolutions in .

In the above question, the resistance between the square faces isA. `3 xx 10^(-9)Omega`B. `3 xx 10^(-7)Omega`C. `3 xx 10^(-5)Omega`D. `3 xx 10^(-3)Omega`

The total current supplied to the circuit by the battery is A. 1AB. 2AC. 4AD. 6A

In the circuit as shown if the current drawn through battery is `0.5A`. Then A. Resistance R = `46Omega`B. Current through `20Omega` resistance is 0.1AC. Potential difference across the middle resistance is 2VD. Potential difference across the `20Omega` resistance is 4V

Thirteen resistances each of resistance `R` ohm are connected in the circuit as shown in the figure below. The effective resistance between `A` and `B` is A. `2ROmega`B. `4R/3Omega`C. `2R/3Omega`D. `Romega`

Current through XY of circuit shown is A. 1AB. 4AC. 2A from B to AD. 3A

If each resistance in the figure is of `9Omega` then reading of ammeter is

The current in the arm CD of the circuit will be A. `i_(1)`B. `i_(2) + i_(3)`C. `I_(1) + i_(3)`D. `i_(1)-i_(2)+i_(3)`

If in the circuit shown below, the internal resistance of the battery is `1.5 Omega` and `V_(P)` and `V_(Q)` are the potential at `P` and `Q` respectively, what is the potential difference between the point `P` and `Q`?

Is the motion of a charge across junction momentum conserving ? Why or why not ?

As the switch `S` is closed in the circuit shown in figure, current passed through it is. A. 4.5AB. 6.0AC. 3.0AD. Zero

Consider the circuit shown in the figure. The current `I_(3)` is equal to A. 5AB. 3AC. `-3A`D. `-5/6A`

Seven resistance are connected as shown in the firgure. The equivalent resistance between `A` and `B` is A. `3Omega`B. `4Omega`C. `4.5Omega`D. `5Omega`

What is the equivalent resistance between the points A and B of the network? A. `57/7Omega`B. `8Omega`C. `6Omega``57/3Omega`D.

In the circuit of adjoining figure the current through `12 Omega` resister will be A. 1AB. 1/5AC. 2/5AD. 0A

A wire has resistance of `24 Omega` is bent in the following shape. The effective resistance between A and B is A. `24Omega`B. `10Omega`C. `16/3Omega`D. None of these

The `V-I` graphs of parallel and series combinations of two metallic resistors are shown in (Fig. 3.53). Which graph represents the parallel combinations ? .A. AB. BC. A and B bothD. Neither A nor B

Find the equivalent resistance between terminals A and B. Each resistor is of resistance R.

In the circuit shown, the value of each resistance is r , then equivalent resistance of circuit between points A and B will be

The equivalent resistance between the points A and B is: A. `36/7Omega`B. `10Omega`C. `85/7Omega`D. none of these