KVPY Stream-SA (Class 11) Physics: Questions 1 - 3 of 242

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Question number: 1

» Current Electricity » Wheatstone Bridge

Appeared in Year: 2010

MCQ▾

Question

Figure A below shows a wheat stone bridge in which P, Q, R, S are fixed resistances, G is a galvanometer and B is a battery. For this particular case the galvanometer shows zero deflection. Now, only the positions of B and G are interchanged, as shown in figure (b). The new deflection of the galvanometer

Wheat stone bridge (Figure A)

Wheat Stone Bridge (Figure A)

Figure A shows a wheat stone bridge in which P, Q, R, S are fixed resistances, G is a galvanometer and B is a battery.

Wheat stone bridge (Figure B)

Wheat Stone Bridge (Figure B)

Figure shows the positions of B and G are interchanged.

Choices

Choice (4) Response

a.

is to the left

b.

is to the righ

c.

is zero

d.

depends on the values of P, Q, R, S

Question number: 2

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

Four identical blocks of metal are at 35ºC, 55 0 C, 75 0 C and 95ºC respectively. The specific heat of the material of the four blocks increases with temperature. Which of the following is true about the final temperature T f when all four blocks are brought into contact? (Assuming that no heat is lost to the surroundings)

Choices

Choice (4) Response

a.

T f can be either more than or less than 65ºC depending on the precise variation of the specific heat with temperature

b.

T f will be less than 65ºC

c.

T f will be more than 65ºC

d.

T f will be 65ºC

Question number: 3

» Current Electricity » Kirchhoff's Laws

MCQ▾

Question

Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion AB is

A section of electric circuit starting A

A Section of Electric Circuit Starting A

Figure shows a section of an electric circuit. The magnitude and direction of the current are also shown in figure.

Choices

Choice (4) Response

a.

1 A

b.

4 A

c.

2 A

d.

3 A

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