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electric instruments questions with solutions
Practice Current electricity for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 43 questions
- NumericmediumCurrent electricity
A moving-coil galvanometer is shunted by a 2 Ω resistance and then gives full-scale deflection when the total current is 500 mA. In a second arrangement, a 470 Ω resistance is connected in series with the galvanometer and full-scale deflection occurs when 10 V is applied. Find the resistance of the galvanometer coil in ohms.
JEE Mains 2026 6 April Evening Shift
Open question & full solution → - MCQeasyCurrent electricity
The resistance per centimeter of a meter bridge wire is r, with X Ω resistance in left gap. Balancing length from left end is at 40 cm with 25 Ω resistance in right gap. Now the wire is replaced by another wire of 2r resistance per centimeter. The new balancing length for same settings will be at
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JEE Mains 2024 31 Jan Evening Shift
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The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of 24 Ω is applied. The resistance of galvanometer coil will be :
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JEE Mains 2024 29 Jan Morning Shift
Open question & full solution → - NumericmediumCurrent electricity
To determine the resistance (R) of a wire, a circuit is designed below. The V-I characteristic curve for this circuit is plotted for the voltmeter and the ammeter readings as shown in figure. The value of R is ______ Ω.
JEE Mains 2024 09 Apr Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
A meter bridge with two resistances R₁ and R₂ as shown in figure was balanced (null point) at 40 cm from the point P. The null point changed to 50 cm from the point P, when 16 Ω resistance is connected in parallel to R₂. The values of resistances R₁ and R₂ are______.
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JEE Mains 202622 January Morning Shift
Open question & full solution → - NumericdifficultCurrent electricity
In the circuit shown in the Figure, cell is ideal and R₂ = 100 Ω. A voltmeter of internal resistance 200 Ω reads V₁₂ = 4 V and V₂₃ = 6 V between the pair of points 1-2 and 2-3 respectively. What will be the reading of the voltmeter between the points 1-3?
Current Electricity Objective Conversion
Open question & full solution → - IntegereasyCurrent electricity
Two identical cells of emf 1.5 V each are connected in series across a 10 Ω resistor. An ideal voltmeter across the 10 Ω resistor reads 1.5 V. Find the internal resistance of each cell in Ω.
JEE Mains11 April 2023Shift 2Evening Shift
Open question & full solution → - MCQeasyCurrent electricity
A galvanometer has a resistance of 50 Ω and allows a maximum current of 5 mA. It can be converted into a voltmeter to measure up to 100 V by connecting in series a resistor of resistance:
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JEE Mains 2024 01 Feb Morning Shift
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Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are V₁, V₂ and V₃. Choose the correct option.
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JEE Mains 2024 27 Jan Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
Two resistors 2 Ω and 3 Ω are connected in the gaps of bridge as shown in figure. The null point is obtained with the contact of jockey at some point on wire XY. When an unknown resistor is connected in parallel with 3 Ω resistor, the null point is shifted by 22.5 cm toward Y. The resistance of unknown resistor is____Ω.
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JEE Mains 202624 January Morning Shift
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