KVPY Stream-SA (Class 11) Physics: Questions 33 - 34 of 252

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Question number: 33

» Current Electricity » Kirchhoff's Laws

Appeared in Year: 2011

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 PQ is

A portion of electric circuit Starting from P

A Portion of Electric Circuit Starting From P

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

Choices

Choice (4) Response

a.

4A from Q to P

b.

3A from P to Q

c.

6A from Q to P

d.

0A

Question number: 34

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2011

MCQ▾

Question

An object with uniform density ρ is attached to a spring that is known to stretch linearly with applied force as shown below.

 A object attached to a spring and immersed in liquid

a Object Attached to a Spring and Immersed in Liquid

Figure shows an object attached to a spring that is known to stretch linearly with applied force as shown below and this object-spring system is immersed in a liquid of density ρ1.

When the spring-object system is immersed in a liquid of density ρ 1 as shown in the figure, the spring stretches by an amount x 1 (ρ > ρ 1). When the experiment is repeated in a liquid of density (ρ 2 < ρ 1), the spring stretches by an amount x 2. Neglecting any buoyant force on the spring, the density of the object is

Choices

Choice (4) Response

a.

ρ=ρ1X1+ρ2X2X1+X2

b.

ρ=ρ1X2ρ2X1X2X1

c.

ρ=ρ1X2+ρ2X1X1+X2

d.

ρ=ρ1X1ρ2X2X1X2

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