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Question-1 The resistance of an ammeter is and its scale is graduated for a current up to 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750A by this meter. The value of shunt resistance is

(A)	(B)
(C)	(D)

Question-2
A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be

(A) 750 watt	(B) 500 watt
(C) 250 watt	(D) 1000 watt

Question-3 A current of 2 A, passing through a conductor produces 80J of heat in 10 s. The resistance of the conductor in ohm is

(A) 0.5	(B)2
(C)4	(D)20

Question-4
The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100 W and 200 V lamp when not in use?

(A) 20 Ω	(B) 40 Ω
(C) 200 Ω	(D) 400 Ω

Question-5 The mean free path of electrons in a metal is . The electric field which can give on an average 2 eV energy to an electron in the metal will be in unit of Vm^-1

(A)	(B)
(C)	(D)

Question-6 In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will

(A) flow from A to B	(B)flow in the direction which will be decided by the value of V
(C)be zero	(D)flow from B to A

Question-7 A cell has an emf 1.5 V. When connected across an external resistance of , the terminal potential difference falls to 1.0V. The internal resistance of the cell is

(A)	(B)
(C)	(D)

Question-8
Two batteries of emf 4V and 8V with internal resistance are connected in a circuit with a resistance of as shown in figure. The current and potential difference between the point P and Q are

(A)	(B)
(C)	(D)

Question-9
The negative Zn pole of a Daniel cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass of the positive Cu pole in this time is

(A) 0.180 g	(B) 0.141 g
(C) 0.126 g	(D) 0.242 g

Question-10 A potentiometer consists of a wire of length 4m and resistance . It is connected to a cell of emf 2 V. The potential gradient of the wire is

(A) 0.5 V/m	(B)2 V/m
(C)5 V/m	(D)10 V/m

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Plus 2 Computer Science

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