Current Electricity questions
395 published questions with worked solutions.
- Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains...
- A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The...
- The current flowing in a coil is 3A and the power consumed is 108W. If the a.c. source is of 120 V, 50 Hz, the resistance in the...
- The range of voltmeter of resistance 'G' is 'V' volt. The resistance required to be connected in series with it in order to...
- The current associated with an electron of charge 'e' moving in a circular orbit of radius 'r' with speed 'v' around the...
- Let 'A' be the cross-sectional area and ' ' be the specific resistance of a potentiometer wire. If 'I' is the current passing...
- In an _____ circuit the current is i = 5 (100t - 2 ) A & voltage is e = 200 sin (100 t) volt. Power consumption in the circuit is...
- If only 1% of total current is passed though a galvanometer of resistance 'G' then the resistance of the shunt is
- A voltmeter of resistance 150 connected across a cell of e.m.f. 3V reads 2.5V. what is the internal resistance of the cell?
- A galvanometer has a current range of 10 mA and a voltage range of 0.75 V. To convert this galvanometer into an ammeter of range...
- In an AC circuit E = 50 sin(500 t), I = 600sin(500t+ 3 )mA. What is the power dissipated in the circuit? [cos 60^0 = 0.5]
- A battery of 6 V is connected to the ends of uniform wire 3 m long and of resistance 100 The difference of potential between two...
- Kirchhoff's second law is based on the law of conservation of
- A 10 m long wire of resistance 20 is connected in series with a battery of e.m.f. 3 V. (negligible internal resistance) & a...
- Two cells E<sub>1</sub> and E<sub>2</sub> having equal E.M.F. 'E' and internal resistance r_1 and r_2 (r_1 > r_2) respectively...
- A cell balances against a length of 150 cm on a potentiometer wire when it is shunted by a resistance of 5 . But when it is...
- When a resistance of 100 is connected in series with a galvanometer of resistance G, its range is V. to double its range a...
- Kirchhoff's voltage law and current law are based (respectively) on the conservation of
- This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes...
- Three resistors of 4Ω, 6Ω and 12Ω are connected in parallel and the combination is connected in series with a 1.5 V battery of 1Ω...
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