KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 1 - 3 of 250

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Question number: 1

» Laws of Motion » Laws of Friction

Appeared in Year: 2010

MCQ▾

Question

A pen of mass ‘m’ is laying on a piece of paper of mass M placed on a rough table. If the coefficient of friction between the pen and paper, and, the paper and table are μ1 and μ2, respectively, then the minimum horizontal force with which the paper has to be pulled for the pen to start slipping is given by-

Choices

Choice (4) Response

a.

m(μ1+μ2)g

b.

(mμ1+Mμ2)g

c.

(m+M)(μ1+μ2)g

d.

{mμ1+(m+M)μ2}g

Question number: 2

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Appeared in Year: 2010

MCQ▾

Question

The circuit shown consists of a switch (S), a battery (B) of emf E, a resistance R, and an inductor L.

A circuit diagram consist of switch, a battery, a resistance R

A Circuit Diagram Consist of Switch, a Battery, a Resistance R

In figure a RL circuit is shown in which a battery (B) of emf E, a switch (S), a resistor (R) and an inductor (L) are connected in series.

The current in the circuit at the instant the switch is closed is –

Choices

Choice (4) Response

a.

ER(1e)

b.

c.

ER

d.

0

Question number: 3

» Magnetic Effects of Current and Magnetism » Cyclotron

Appeared in Year: 2010

MCQ▾

Question

A charged particle of charge q and mass m, gets deflected through an angle θ upon passing through a square region of side ‘a’ which contains a uniform magnetic field B normal to its plane. Assuming that the particle entered the square at right angles to one side, what is the speed of the particle?

Choices

Choice (4) Response

a.

qBmacotθ

b.

qBmacot2θ

c.

qBmatanθ

d.

qBmatan2θ

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